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ClickHouse/utils/clickhouse-diagnostics/README.md
Alexey Milovidov deac6cfb5d Minor modifications
2022-08-28 20:49:39 +02:00

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## Download
Cloning whole repo will take a lot of time and disk space. The following commands will download only this directory.
* Requires Git 2.19
```
# mkdir chdiag
# cd chdiag
# git clone --depth 1 --filter=blob:none --no-checkout https://github.com/ClickHouse/ClickHouse
# cd ClickHouse
# git sparse-checkout set utils/clickhouse-diagnostics
# git checkout master -- utils/clickhouse-diagnostics
```
## Installation
```
python3 -m pip install -r requirements.txt
```
## Usage
```
./clickhouse-diagnostics --host localhost --port 8123 --user default --password xxx
```
Example output:
### Diagnostics data for host clickhouse01.test_net_3697
Version: **21.11.8.4**
Timestamp: **2021-12-25 15:34:02**
Uptime: **13 minutes and 51 seconds**
#### ClickHouse configuration
**result**
```XML
<clickhouse>
<logger>
<level>trace</level>
<log>/var/log/clickhouse-server/clickhouse-server.log</log>
<errorlog>/var/log/clickhouse-server/clickhouse-server.err.log</errorlog>
<size>1000M</size>
<count>10</count>
<console>1</console>
</logger>
<http_port>8123</http_port>
<tcp_port>9000</tcp_port>
<mysql_port>9004</mysql_port>
<postgresql_port>9005</postgresql_port>
<interserver_http_port>9009</interserver_http_port>
<max_connections>4096</max_connections>
<keep_alive_timeout>3</keep_alive_timeout>
<grpc>
<enable_ssl>false</enable_ssl>
<ssl_cert_file>/path/to/ssl_cert_file</ssl_cert_file>
<ssl_key_file>/path/to/ssl_key_file</ssl_key_file>
<ssl_require_client_auth>false</ssl_require_client_auth>
<ssl_ca_cert_file>/path/to/ssl_ca_cert_file</ssl_ca_cert_file>
<compression>deflate</compression>
<compression_level>medium</compression_level>
<max_send_message_size>-1</max_send_message_size>
<max_receive_message_size>-1</max_receive_message_size>
<verbose_logs>false</verbose_logs>
</grpc>
<openSSL>
<server>
<certificateFile>/etc/clickhouse-server/server.crt</certificateFile>
<privateKeyFile>/etc/clickhouse-server/server.key</privateKeyFile>
<dhParamsFile></dhParamsFile>
<verificationMode>none</verificationMode>
<loadDefaultCAFile>true</loadDefaultCAFile>
<cacheSessions>true</cacheSessions>
<disableProtocols>sslv2,sslv3</disableProtocols>
<preferServerCiphers>true</preferServerCiphers>
</server>
<client>
<loadDefaultCAFile>true</loadDefaultCAFile>
<cacheSessions>true</cacheSessions>
<disableProtocols>sslv2,sslv3,tlsv1,tlsv1_1</disableProtocols>
<preferServerCiphers>true</preferServerCiphers>
<invalidCertificateHandler>
<name>RejectCertificateHandler</name>
</invalidCertificateHandler>
<certificateFile>/etc/clickhouse-server/server.crt</certificateFile>
<privateKeyFile>/etc/clickhouse-server/server.key</privateKeyFile>
<caConfig>/etc/clickhouse-server/allCAs.pem</caConfig>
</client>
</openSSL>
<max_concurrent_queries>100</max_concurrent_queries>
<max_server_memory_usage>0</max_server_memory_usage>
<max_thread_pool_size>10000</max_thread_pool_size>
<max_server_memory_usage_to_ram_ratio>0.9</max_server_memory_usage_to_ram_ratio>
<total_memory_profiler_step>4194304</total_memory_profiler_step>
<total_memory_tracker_sample_probability>0</total_memory_tracker_sample_probability>
<uncompressed_cache_size>8589934592</uncompressed_cache_size>
<mark_cache_size>5368709120</mark_cache_size>
<mmap_cache_size>1000</mmap_cache_size>
<compiled_expression_cache_size>134217728</compiled_expression_cache_size>
<compiled_expression_cache_elements_size>10000</compiled_expression_cache_elements_size>
<path>/var/lib/clickhouse/</path>
<tmp_path>/var/lib/clickhouse/tmp/</tmp_path>
<user_files_path>/var/lib/clickhouse/user_files/</user_files_path>
<ldap_servers></ldap_servers>
<user_directories>
<users_xml>
<path>users.xml</path>
</users_xml>
<local_directory>
<path>/var/lib/clickhouse/access/</path>
</local_directory>
</user_directories>
<default_profile>default</default_profile>
<custom_settings_prefixes></custom_settings_prefixes>
<default_database>default</default_database>
<mlock_executable>true</mlock_executable>
<remap_executable>false</remap_executable>
<remote_servers>
<test_shard_localhost>
<shard>
<replica>
<host>localhost</host>
<port>9000</port>
</replica>
</shard>
</test_shard_localhost>
<test_cluster_two_shards_localhost>
<shard>
<replica>
<host>localhost</host>
<port>9000</port>
</replica>
</shard>
<shard>
<replica>
<host>localhost</host>
<port>9000</port>
</replica>
</shard>
</test_cluster_two_shards_localhost>
<test_cluster_two_shards>
<shard>
<replica>
<host>127.0.0.1</host>
<port>9000</port>
</replica>
</shard>
<shard>
<replica>
<host>127.0.0.2</host>
<port>9000</port>
</replica>
</shard>
</test_cluster_two_shards>
<test_cluster_two_shards_internal_replication>
<shard>
<internal_replication>true</internal_replication>
<replica>
<host>127.0.0.1</host>
<port>9000</port>
</replica>
</shard>
<shard>
<internal_replication>true</internal_replication>
<replica>
<host>127.0.0.2</host>
<port>9000</port>
</replica>
</shard>
</test_cluster_two_shards_internal_replication>
<test_shard_localhost_secure>
<shard>
<replica>
<host>localhost</host>
<port>9440</port>
<secure>1</secure>
</replica>
</shard>
</test_shard_localhost_secure>
<test_unavailable_shard>
<shard>
<replica>
<host>localhost</host>
<port>9000</port>
</replica>
</shard>
<shard>
<replica>
<host>localhost</host>
<port>1</port>
</replica>
</shard>
</test_unavailable_shard>
<cluster_name>
<shard>
<replica>
<host>clickhouse01.test_net_3697</host>
<port>9000</port>
</replica>
</shard>
</cluster_name>
</remote_servers>
<builtin_dictionaries_reload_interval>3600</builtin_dictionaries_reload_interval>
<max_session_timeout>3600</max_session_timeout>
<default_session_timeout>60</default_session_timeout>
<query_log>
<database>system</database>
<table>query_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</query_log>
<trace_log>
<database>system</database>
<table>trace_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</trace_log>
<query_thread_log>
<database>system</database>
<table>query_thread_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</query_thread_log>
<query_views_log>
<database>system</database>
<table>query_views_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</query_views_log>
<part_log>
<database>system</database>
<table>part_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</part_log>
<metric_log>
<database>system</database>
<table>metric_log</table>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
<collect_interval_milliseconds>1000</collect_interval_milliseconds>
</metric_log>
<asynchronous_metric_log>
<database>system</database>
<table>asynchronous_metric_log</table>
<flush_interval_milliseconds>7000</flush_interval_milliseconds>
</asynchronous_metric_log>
<opentelemetry_span_log>
<engine>engine MergeTree
partition by toYYYYMM(finish_date)
order by (finish_date, finish_time_us, trace_id)</engine>
<database>system</database>
<table>opentelemetry_span_log</table>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</opentelemetry_span_log>
<crash_log>
<database>system</database>
<table>crash_log</table>
<partition_by></partition_by>
<flush_interval_milliseconds>1000</flush_interval_milliseconds>
</crash_log>
<session_log>
<database>system</database>
<table>session_log</table>
<partition_by>toYYYYMM(event_date)</partition_by>
<flush_interval_milliseconds>7500</flush_interval_milliseconds>
</session_log>
<top_level_domains_lists></top_level_domains_lists>
<dictionaries_config>*_dictionary.xml</dictionaries_config>
<user_defined_executable_functions_config>*_function.xml</user_defined_executable_functions_config>
<encryption_codecs></encryption_codecs>
<distributed_ddl>
<path>/clickhouse/task_queue/ddl</path>
</distributed_ddl>
<graphite_rollup_example>
<pattern>
<regexp>click_cost</regexp>
<function>any</function>
<retention>
<age>0</age>
<precision>3600</precision>
</retention>
<retention>
<age>86400</age>
<precision>60</precision>
</retention>
</pattern>
<default>
<function>max</function>
<retention>
<age>0</age>
<precision>60</precision>
</retention>
<retention>
<age>3600</age>
<precision>300</precision>
</retention>
<retention>
<age>86400</age>
<precision>3600</precision>
</retention>
</default>
</graphite_rollup_example>
<format_schema_path>/var/lib/clickhouse/format_schemas/</format_schema_path>
<query_masking_rules>
<rule>
<name>hide encrypt/decrypt arguments</name>
<regexp>((?:aes_)?(?:encrypt|decrypt)(?:_mysql)?)\s*\(\s*(?:'(?:\\'|.)+'|.*?)\s*\)</regexp>
<replace>\1(???)</replace>
</rule>
</query_masking_rules>
<send_crash_reports>
<enabled>false</enabled>
<anonymize>false</anonymize>
<endpoint>https://6f33034cfe684dd7a3ab9875e57b1c8d@o388870.ingest.sentry.io/5226277</endpoint>
</send_crash_reports>
<listen_host>0.0.0.0</listen_host>
<https_port>8443</https_port>
<tcp_ssl_port>9440</tcp_ssl_port>
<zookeeper>
<node index="1">
<host>zookeeper01.test_net_3697</host>
<port>2281</port>
<secure>1</secure>
</node>
<session_timeout_ms>3000</session_timeout_ms>
<root>/clickhouse01</root>
<identity>*****</identity>
</zookeeper>
<macros>
<replica>clickhouse01</replica>
<shard>shard1</shard>
</macros>
<database_atomic_delay_before_drop_table_sec>0</database_atomic_delay_before_drop_table_sec>
<storage_configuration>
<disks>
<hdd1>
<path>/hdd1/</path>
</hdd1>
<hdd2>
<path>/hdd2/</path>
</hdd2>
<s3>
<type>s3</type>
<endpoint>http://minio01:9000/cloud-storage-01/data/</endpoint>
<access_key_id>bB5vT2M8yaRv9J14SnAP</access_key_id>
<secret_access_key>*****</secret_access_key>
<send_metadata>true</send_metadata>
</s3>
</disks>
<policies>
<multiple_disks>
<volumes>
<main>
<disk>default</disk>
</main>
<hdd1>
<disk>hdd1</disk>
</hdd1>
<hdd2>
<disk>hdd2</disk>
</hdd2>
</volumes>
<move_factor>0.0</move_factor>
</multiple_disks>
<s3>
<volumes>
<main>
<disk>s3</disk>
</main>
<external>
<disk>default</disk>
</external>
</volumes>
<move_factor>0.0</move_factor>
</s3>
<s3_cold>
<volumes>
<main>
<disk>default</disk>
</main>
<external>
<disk>s3</disk>
</external>
</volumes>
<move_factor>0.0</move_factor>
</s3_cold>
</policies>
</storage_configuration>
```
#### Access configuration
**query**
```sql
SHOW ACCESS
```
**result**
```
CREATE USER default IDENTIFIED WITH plaintext_password SETTINGS PROFILE default
CREATE SETTINGS PROFILE default SETTINGS max_memory_usage = 10000000000, load_balancing = 'random'
CREATE SETTINGS PROFILE readonly SETTINGS readonly = 1
CREATE QUOTA default KEYED BY user_name FOR INTERVAL 1 hour TRACKING ONLY TO default
GRANT ALL ON *.* TO default WITH GRANT OPTION
```
#### Quotas
**query**
```sql
SHOW QUOTA
```
**result**
```
Row 1:
──────
quota_name: default
quota_key: default
start_time: 2021-12-25 15:00:00
end_time: 2021-12-25 16:00:00
duration: 3600
queries: 49
max_queries: ᴺᵁᴸᴸ
query_selects: 49
max_query_selects: ᴺᵁᴸᴸ
query_inserts: 0
max_query_inserts: ᴺᵁᴸᴸ
errors: 6
max_errors: ᴺᵁᴸᴸ
result_rows: 607
max_result_rows: ᴺᵁᴸᴸ
result_bytes: 237632
max_result_bytes: ᴺᵁᴸᴸ
read_rows: 1256
max_read_rows: ᴺᵁᴸᴸ
read_bytes: 778936
max_read_bytes: ᴺᵁᴸᴸ
execution_time: 0
max_execution_time: ᴺᵁᴸᴸ
```
#### Schema
##### Database engines
**query**
```sql
SELECT
engine,
count() "count"
FROM system.databases
GROUP BY engine
```
**result**
```
┌─engine─┬─count─┐
│ Memory │ 2 │
│ Atomic │ 2 │
└────────┴───────┘
```
##### Databases (top 10 by size)
**query**
```sql
SELECT
name,
engine,
tables,
partitions,
parts,
formatReadableSize(bytes_on_disk) "disk_size"
FROM system.databases db
LEFT JOIN
(
SELECT
database,
uniq(table) "tables",
uniq(table, partition) "partitions",
count() AS parts,
sum(bytes_on_disk) "bytes_on_disk"
FROM system.parts
WHERE active
GROUP BY database
) AS db_stats ON db.name = db_stats.database
ORDER BY bytes_on_disk DESC
LIMIT 10
```
**result**
```
┌─name───────────────┬─engine─┬─tables─┬─partitions─┬─parts─┬─disk_size──┐
│ system │ Atomic │ 6 │ 6 │ 22 │ 716.29 KiB │
│ INFORMATION_SCHEMA │ Memory │ 0 │ 0 │ 0 │ 0.00 B │
│ default │ Atomic │ 0 │ 0 │ 0 │ 0.00 B │
│ information_schema │ Memory │ 0 │ 0 │ 0 │ 0.00 B │
└────────────────────┴────────┴────────┴────────────┴───────┴────────────┘
```
##### Table engines
**query**
```sql
SELECT
engine,
count() "count"
FROM system.tables
WHERE database != 'system'
GROUP BY engine
```
**result**
```
┌─engine─┬─count─┐
│ View │ 8 │
└────────┴───────┘
```
##### Dictionaries
**query**
```sql
SELECT
source,
type,
status,
count() "count"
FROM system.dictionaries
GROUP BY source, type, status
ORDER BY status DESC, source
```
**result**
```
```
#### Replication
##### Replicated tables (top 10 by absolute delay)
**query**
```sql
SELECT
database,
table,
is_leader,
is_readonly,
absolute_delay,
queue_size,
inserts_in_queue,
merges_in_queue
FROM system.replicas
ORDER BY absolute_delay DESC
LIMIT 10
```
**result**
```
```
##### Replication queue (top 20 oldest tasks)
**query**
```sql
SELECT
database,
table,
replica_name,
position,
node_name,
type,
source_replica,
parts_to_merge,
new_part_name,
create_time,
required_quorum,
is_detach,
is_currently_executing,
num_tries,
last_attempt_time,
last_exception,
concat('time: ', toString(last_postpone_time), ', number: ', toString(num_postponed), ', reason: ', postpone_reason) postpone
FROM system.replication_queue
ORDER BY create_time ASC
LIMIT 20
```
**result**
```
```
##### Replicated fetches
**query**
```sql
SELECT
database,
table,
round(elapsed, 1) "elapsed",
round(100 * progress, 1) "progress",
partition_id,
result_part_name,
result_part_path,
total_size_bytes_compressed,
bytes_read_compressed,
source_replica_path,
source_replica_hostname,
source_replica_port,
interserver_scheme,
to_detached,
thread_id
FROM system.replicated_fetches
```
**result**
```
```
#### Top 10 tables by max parts per partition
**query**
```sql
SELECT
database,
table,
count() "partitions",
sum(part_count) "parts",
max(part_count) "max_parts_per_partition"
FROM
(
SELECT
database,
table,
partition,
count() "part_count"
FROM system.parts
WHERE active
GROUP BY database, table, partition
) partitions
GROUP BY database, table
ORDER BY max_parts_per_partition DESC
LIMIT 10
```
**result**
```
┌─database─┬─table───────────────────┬─partitions─┬─parts─┬─max_parts_per_partition─┐
│ system │ metric_log │ 1 │ 5 │ 5 │
│ system │ trace_log │ 1 │ 5 │ 5 │
│ system │ query_thread_log │ 1 │ 3 │ 3 │
│ system │ query_log │ 1 │ 3 │ 3 │
│ system │ asynchronous_metric_log │ 1 │ 3 │ 3 │
│ system │ session_log │ 1 │ 3 │ 3 │
└──────────┴─────────────────────────┴────────────┴───────┴─────────────────────────┘
```
#### Merges in progress
**query**
```sql
SELECT
database,
table,
round(elapsed, 1) "elapsed",
round(100 * progress, 1) "progress",
is_mutation,
partition_id,
result_part_path,
source_part_paths,
num_parts,
formatReadableSize(total_size_bytes_compressed) "total_size_compressed",
formatReadableSize(bytes_read_uncompressed) "read_uncompressed",
formatReadableSize(bytes_written_uncompressed) "written_uncompressed",
columns_written,
formatReadableSize(memory_usage) "memory_usage",
thread_id
FROM system.merges
```
**result**
```
```
#### Mutations in progress
**query**
```sql
SELECT
database,
table,
mutation_id,
command,
create_time,
parts_to_do_names,
parts_to_do,
is_done,
latest_failed_part,
latest_fail_time,
latest_fail_reason
FROM system.mutations
WHERE NOT is_done
ORDER BY create_time DESC
```
**result**
```
```
#### Recent data parts (modification time within last 3 minutes)
**query**
```sql
SELECT
database,
table,
engine,
partition_id,
name,
part_type,
active,
level,
disk_name,
path,
marks,
rows,
bytes_on_disk,
data_compressed_bytes,
data_uncompressed_bytes,
marks_bytes,
modification_time,
remove_time,
refcount,
is_frozen,
min_date,
max_date,
min_time,
max_time,
min_block_number,
max_block_number
FROM system.parts
WHERE modification_time > now() - INTERVAL 3 MINUTE
ORDER BY modification_time DESC
```
**result**
```
Row 1:
──────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_110_110_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_110_110_0/
marks: 2
rows: 8
bytes_on_disk: 21752
data_compressed_bytes: 11699
data_uncompressed_bytes: 19952
marks_bytes: 10032
modification_time: 2021-12-25 15:33:59
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 110
max_block_number: 110
Row 2:
──────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_118_118_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_118_118_0/
marks: 2
rows: 4767
bytes_on_disk: 10856
data_compressed_bytes: 10656
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:58
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 118
max_block_number: 118
Row 3:
──────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_117_117_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_117_117_0/
marks: 2
rows: 4767
bytes_on_disk: 11028
data_compressed_bytes: 10828
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:51
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 117
max_block_number: 117
Row 4:
──────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_109_109_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_109_109_0/
marks: 2
rows: 7
bytes_on_disk: 21802
data_compressed_bytes: 11749
data_uncompressed_bytes: 17458
marks_bytes: 10032
modification_time: 2021-12-25 15:33:51
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 109
max_block_number: 109
Row 5:
──────
database: system
table: trace_log
engine: MergeTree
partition_id: 202112
name: 202112_53_53_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/c0b/c0bc3be3-22d7-45a3-80bc-3be322d7b5a3/202112_53_53_0/
marks: 2
rows: 6
bytes_on_disk: 1057
data_compressed_bytes: 700
data_uncompressed_bytes: 1894
marks_bytes: 336
modification_time: 2021-12-25 15:33:49
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 53
max_block_number: 53
Row 6:
──────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_116_116_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_116_116_0/
marks: 2
rows: 4767
bytes_on_disk: 10911
data_compressed_bytes: 10711
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:44
remove_time: 2021-12-25 15:33:44
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 116
max_block_number: 116
Row 7:
──────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_1_116_23
part_type: Wide
active: 1
level: 23
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_1_116_23/
marks: 69
rows: 553071
bytes_on_disk: 435279
data_compressed_bytes: 424915
data_uncompressed_bytes: 13289123
marks_bytes: 9936
modification_time: 2021-12-25 15:33:44
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 1
max_block_number: 116
Row 8:
──────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_108_108_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_108_108_0/
marks: 2
rows: 8
bytes_on_disk: 21833
data_compressed_bytes: 11780
data_uncompressed_bytes: 19952
marks_bytes: 10032
modification_time: 2021-12-25 15:33:44
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 108
max_block_number: 108
Row 9:
───────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_115_115_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_115_115_0/
marks: 2
rows: 4767
bytes_on_disk: 11146
data_compressed_bytes: 10946
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:37
remove_time: 2021-12-25 15:33:44
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 115
max_block_number: 115
Row 10:
───────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_107_107_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_107_107_0/
marks: 2
rows: 7
bytes_on_disk: 21996
data_compressed_bytes: 11943
data_uncompressed_bytes: 17458
marks_bytes: 10032
modification_time: 2021-12-25 15:33:36
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 107
max_block_number: 107
Row 11:
───────
database: system
table: session_log
engine: MergeTree
partition_id: 202112
name: 202112_3_3_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9f3/9f3dd592-781c-48d8-9f3d-d592781c48d8/202112_3_3_0/
marks: 2
rows: 44
bytes_on_disk: 2208
data_compressed_bytes: 1498
data_uncompressed_bytes: 5130
marks_bytes: 688
modification_time: 2021-12-25 15:33:34
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 3
max_block_number: 3
Row 12:
───────
database: system
table: query_log
engine: MergeTree
partition_id: 202112
name: 202112_3_3_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/1a3/1a3ec308-d42e-4f3c-9a3e-c308d42e2f3c/202112_3_3_0/
marks: 2
rows: 43
bytes_on_disk: 17843
data_compressed_bytes: 15725
data_uncompressed_bytes: 61869
marks_bytes: 2096
modification_time: 2021-12-25 15:33:34
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 3
max_block_number: 3
Row 13:
───────
database: system
table: query_thread_log
engine: MergeTree
partition_id: 202112
name: 202112_3_3_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/afa/afa652ef-f91d-4a48-afa6-52eff91daa48/202112_3_3_0/
marks: 2
rows: 43
bytes_on_disk: 11878
data_compressed_bytes: 10432
data_uncompressed_bytes: 52339
marks_bytes: 1424
modification_time: 2021-12-25 15:33:34
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 3
max_block_number: 3
Row 14:
───────
database: system
table: trace_log
engine: MergeTree
partition_id: 202112
name: 202112_52_52_0
part_type: Compact
active: 1
level: 0
disk_name: default
path: /var/lib/clickhouse/store/c0b/c0bc3be3-22d7-45a3-80bc-3be322d7b5a3/202112_52_52_0/
marks: 2
rows: 4
bytes_on_disk: 1078
data_compressed_bytes: 721
data_uncompressed_bytes: 1252
marks_bytes: 336
modification_time: 2021-12-25 15:33:34
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 52
max_block_number: 52
Row 15:
───────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_114_114_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_114_114_0/
marks: 2
rows: 4767
bytes_on_disk: 11447
data_compressed_bytes: 11247
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:30
remove_time: 2021-12-25 15:33:44
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 114
max_block_number: 114
Row 16:
───────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_1_106_21
part_type: Compact
active: 1
level: 21
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_1_106_21/
marks: 2
rows: 798
bytes_on_disk: 84853
data_compressed_bytes: 74798
data_uncompressed_bytes: 1990212
marks_bytes: 10032
modification_time: 2021-12-25 15:33:29
remove_time: 1970-01-01 03:00:00
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 1
max_block_number: 106
Row 17:
───────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_106_106_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_106_106_0/
marks: 2
rows: 8
bytes_on_disk: 21863
data_compressed_bytes: 11810
data_uncompressed_bytes: 19952
marks_bytes: 10032
modification_time: 2021-12-25 15:33:28
remove_time: 2021-12-25 15:33:29
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 106
max_block_number: 106
Row 18:
───────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_113_113_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_113_113_0/
marks: 2
rows: 4767
bytes_on_disk: 11191
data_compressed_bytes: 10991
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:23
remove_time: 2021-12-25 15:33:44
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 113
max_block_number: 113
Row 19:
───────
database: system
table: metric_log
engine: MergeTree
partition_id: 202112
name: 202112_105_105_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/9a2/9a2fb3b4-8ced-4c0b-9a2f-b3b48ced4c0b/202112_105_105_0/
marks: 2
rows: 7
bytes_on_disk: 21786
data_compressed_bytes: 11733
data_uncompressed_bytes: 17458
marks_bytes: 10032
modification_time: 2021-12-25 15:33:21
remove_time: 2021-12-25 15:33:29
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 105
max_block_number: 105
Row 20:
───────
database: system
table: asynchronous_metric_log
engine: MergeTree
partition_id: 202112
name: 202112_112_112_0
part_type: Compact
active: 0
level: 0
disk_name: default
path: /var/lib/clickhouse/store/78e/78e6eec8-3f71-4724-b8e6-eec83f71a724/202112_112_112_0/
marks: 2
rows: 4767
bytes_on_disk: 11281
data_compressed_bytes: 11081
data_uncompressed_bytes: 128675
marks_bytes: 176
modification_time: 2021-12-25 15:33:16
remove_time: 2021-12-25 15:33:44
refcount: 1
is_frozen: 0
min_date: 2021-12-25
max_date: 2021-12-25
min_time: 1970-01-01 03:00:00
max_time: 1970-01-01 03:00:00
min_block_number: 112
max_block_number: 112
```
#### Detached data
##### system.detached_parts
**query**
```sql
SELECT
database,
table,
partition_id,
name,
disk,
reason,
min_block_number,
max_block_number,
level
FROM system.detached_parts
```
**result**
```
┌─database─┬─table─┬─partition_id─┬─name─┬─disk─┬─reason─┬─min_block_number─┬─max_block_number─┬─level─┐
└──────────┴───────┴──────────────┴──────┴──────┴────────┴──────────────────┴──────────────────┴───────┘
```
##### Disk space usage
**command**
```
du -sh -L -c /var/lib/clickhouse/data/*/*/detached/* | sort -rsh
```
**result**
```
0 total
```
#### Queries
##### Queries in progress (process list)
**query**
```sql
SELECT
elapsed,
query_id,
query,
is_cancelled,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
formatReadableSize(memory_usage) AS "memory usage",
user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
thread_ids,
ProfileEvents,
Settings
FROM system.processes
ORDER BY elapsed DESC
```
**result**
```
Row 1:
──────
elapsed: 0.000785246
query_id: b51cbc7a-2260-4c9b-b26c-6307b10ad948
query: SELECT
elapsed,
query_id,
query,
is_cancelled,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
formatReadableSize(memory_usage) AS "memory usage",
user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
thread_ids,
ProfileEvents,
Settings
FROM system.processes
ORDER BY elapsed DESC FORMAT Vertical
is_cancelled: 0
read: 0 rows / 0.00 B
written: 0 rows / 0.00 B
memory usage: 0.00 B
user: default
client: python-requests/2.26.0
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'ContextLock':38,'RWLockAcquiredReadLocks':1}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
```
##### Top 10 queries by duration
**query**
```sql
SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY query_duration_ms DESC
LIMIT 10
```
**result**
```
Row 1:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:25:01
query_duration_ms: 60
query_id: f72e1120-cc66-434c-9809-3a99077ed842
query_kind: Select
is_initial_query: 1
query: SELECT
database,
table,
count() "partitions",
sum(part_count) "parts",
max(part_count) "max_parts_per_partition"
FROM
(
SELECT
database,
table,
partition,
count() "part_count"
FROM system.parts
WHERE active
GROUP BY database, table, partition
) partitions
GROUP BY database, table
ORDER BY max_parts_per_partition DESC
LIMIT 10 FORMAT PrettyCompactNoEscapes
read: 5 rows / 262.00 B
written: 0 rows / 0.00 B
result: 3 rows / 488.00 B
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.parts']
columns: ['system.parts.active','system.parts.database','system.parts.partition','system.parts.table']
used_aggregate_functions: ['count','max','sum']
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['PrettyCompactNoEscapes']
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'ArenaAllocChunks':2,'ArenaAllocBytes':8192,'CompileFunction':1,'CompileExpressionsMicroseconds':52574,'CompileExpressionsBytes':8192,'SelectedRows':5,'SelectedBytes':262,'ContextLock':58,'RWLockAcquiredReadLocks':6,'RealTimeMicroseconds':61493,'UserTimeMicroseconds':34154,'SystemTimeMicroseconds':9874,'SoftPageFaults':170,'HardPageFaults':33,'OSIOWaitMicroseconds':10000,'OSCPUWaitMicroseconds':2433,'OSCPUVirtualTimeMicroseconds':43706,'OSReadBytes':3080192,'OSWriteBytes':4096,'OSReadChars':863,'OSWriteChars':5334}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 2:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:26:26
query_duration_ms: 12
query_id: eabd7483-70df-4d60-a668-d8961416e3fb
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY query_duration_ms DESC
LIMIT 10 FORMAT Vertical
read: 40 rows / 67.42 KiB
written: 0 rows / 0.00 B
result: 10 rows / 41.23 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':2,'Seek':3,'ReadBufferFromFileDescriptorRead':10,'ReadBufferFromFileDescriptorReadBytes':16873,'ReadCompressedBytes':12855,'CompressedReadBufferBlocks':41,'CompressedReadBufferBytes':61376,'IOBufferAllocs':5,'IOBufferAllocBytes':26594,'FunctionExecute':28,'MarkCacheHits':1,'MarkCacheMisses':1,'CreatedReadBufferOrdinary':3,'DiskReadElapsedMicroseconds':30,'SelectedParts':1,'SelectedRanges':1,'SelectedMarks':1,'SelectedRows':40,'SelectedBytes':69039,'ContextLock':342,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':14451,'UserTimeMicroseconds':10009,'SystemTimeMicroseconds':1515,'SoftPageFaults':44,'OSCPUWaitMicroseconds':3050,'OSCPUVirtualTimeMicroseconds':11523,'OSReadChars':17311,'OSWriteChars':7288}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 3:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 12
query_id: d9557845-5b5e-44ef-befa-55f837065d00
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY query_duration_ms DESC
LIMIT 10 FORMAT Vertical
read: 83 rows / 130.00 KiB
written: 0 rows / 0.00 B
result: 10 rows / 183.10 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66,283,225,281,282]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':3,'Seek':6,'ReadBufferFromFileDescriptorRead':18,'ReadBufferFromFileDescriptorReadBytes':32140,'ReadCompressedBytes':25892,'CompressedReadBufferBlocks':82,'CompressedReadBufferBytes':116215,'IOBufferAllocs':9,'IOBufferAllocBytes':47368,'FunctionExecute':51,'MarkCacheHits':3,'MarkCacheMisses':1,'CreatedReadBufferOrdinary':5,'DiskReadElapsedMicroseconds':13,'SelectedParts':2,'SelectedRanges':2,'SelectedMarks':2,'SelectedRows':83,'SelectedBytes':133125,'ContextLock':351,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':19368,'UserTimeMicroseconds':12036,'SystemTimeMicroseconds':2047,'SoftPageFaults':42,'OSCPUWaitMicroseconds':710,'OSCPUVirtualTimeMicroseconds':13623,'OSWriteBytes':4096,'OSReadChars':34225,'OSWriteChars':8142}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 4:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 11
query_id: bae8a338-eee9-406b-80d2-4596af2ba31f
query_kind: Select
is_initial_query: 1
query: SELECT
name,
engine,
tables,
partitions,
parts,
formatReadableSize(bytes_on_disk) "disk_size"
FROM system.databases db
LEFT JOIN
(
SELECT
database,
uniq(table) "tables",
uniq(table, partition) "partitions",
count() AS parts,
sum(bytes_on_disk) "bytes_on_disk"
FROM system.parts
WHERE active
GROUP BY database
) AS db_stats ON db.name = db_stats.database
ORDER BY bytes_on_disk DESC
LIMIT 10 FORMAT PrettyCompactNoEscapes
read: 17 rows / 1.31 KiB
written: 0 rows / 0.00 B
result: 4 rows / 640.00 B
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.databases','system.parts']
columns: ['system.databases.engine','system.databases.name','system.parts.active','system.parts.bytes_on_disk','system.parts.database','system.parts.partition','system.parts.table']
used_aggregate_functions: ['count','sum','uniq']
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['PrettyCompactNoEscapes']
used_functions: ['formatReadableSize']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'ArenaAllocChunks':5,'ArenaAllocBytes':20480,'FunctionExecute':1,'SelectedRows':17,'SelectedBytes':1345,'ContextLock':69,'RWLockAcquiredReadLocks':9,'RealTimeMicroseconds':12225,'UserTimeMicroseconds':10731,'SystemTimeMicroseconds':1146,'SoftPageFaults':2,'OSCPUWaitMicroseconds':720,'OSCPUVirtualTimeMicroseconds':11876,'OSWriteBytes':4096,'OSReadChars':438,'OSWriteChars':8938}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 5:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:26:26
query_duration_ms: 9
query_id: f0c62bc7-36da-4542-a3d5-68a40c1c4b48
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
AND exception != ''
ORDER BY query_start_time DESC
LIMIT 10 FORMAT Vertical
read: 40 rows / 67.42 KiB
written: 0 rows / 0.00 B
result: 4 rows / 43.13 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':1,'Seek':3,'ReadBufferFromFileDescriptorRead':8,'ReadBufferFromFileDescriptorReadBytes':15561,'ReadCompressedBytes':12855,'CompressedReadBufferBlocks':41,'CompressedReadBufferBytes':61376,'IOBufferAllocs':4,'IOBufferAllocBytes':25506,'FunctionExecute':31,'MarkCacheHits':2,'CreatedReadBufferOrdinary':2,'DiskReadElapsedMicroseconds':16,'SelectedParts':1,'SelectedRanges':1,'SelectedMarks':1,'SelectedRows':40,'SelectedBytes':69039,'ContextLock':361,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':11353,'UserTimeMicroseconds':8910,'SystemTimeMicroseconds':533,'SoftPageFaults':7,'HardPageFaults':2,'OSCPUWaitMicroseconds':1117,'OSCPUVirtualTimeMicroseconds':9443,'OSReadBytes':16384,'OSWriteBytes':4096,'OSReadChars':15999,'OSWriteChars':7714,'QueryProfilerRuns':1}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 6:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 8
query_id: 72f3f9de-d17c-456b-8316-d494bea2096a
query_kind: Select
is_initial_query: 1
query: SELECT name FROM system.tables WHERE database = 'system' FORMAT JSONCompact
read: 74 rows / 2.61 KiB
written: 0 rows / 0.00 B
result: 74 rows / 2.00 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.tables']
columns: ['system.tables.database','system.tables.name']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['JSONCompact']
used_functions: ['equals']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':2,'IOBufferAllocBytes':8192,'FunctionExecute':4,'SelectedRows':74,'SelectedBytes':2675,'ContextLock':23,'RWLockAcquiredReadLocks':75,'RealTimeMicroseconds':9190,'UserTimeMicroseconds':6468,'SystemTimeMicroseconds':517,'OSCPUWaitMicroseconds':2237,'OSCPUVirtualTimeMicroseconds':6984,'OSReadChars':438,'OSWriteChars':1270}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 7:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 8
query_id: d55da87f-b030-4b5d-95fc-f9103ce58601
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY memory_usage DESC
LIMIT 10 FORMAT Vertical
read: 83 rows / 130.00 KiB
written: 0 rows / 0.00 B
result: 10 rows / 178.41 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66,283,283,225,282]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':2,'Seek':6,'ReadBufferFromFileDescriptorRead':16,'ReadBufferFromFileDescriptorReadBytes':30044,'ReadCompressedBytes':25892,'CompressedReadBufferBlocks':82,'CompressedReadBufferBytes':116215,'IOBufferAllocs':8,'IOBufferAllocBytes':45272,'FunctionExecute':51,'MarkCacheHits':4,'CreatedReadBufferOrdinary':4,'SelectedParts':2,'SelectedRanges':2,'SelectedMarks':2,'SelectedRows':83,'SelectedBytes':133125,'ContextLock':351,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':12416,'UserTimeMicroseconds':7727,'SystemTimeMicroseconds':1247,'SoftPageFaults':41,'OSCPUWaitMicroseconds':1058,'OSCPUVirtualTimeMicroseconds':9018,'OSWriteBytes':4096,'OSReadChars':32137,'OSWriteChars':8108}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 8:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 8
query_id: cc2a0e7a-3b9b-47d2-9255-009c62584bc4
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
AND exception != ''
ORDER BY query_start_time DESC
LIMIT 10 FORMAT Vertical
read: 83 rows / 130.00 KiB
written: 0 rows / 0.00 B
result: 5 rows / 57.80 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66,281,283,282,225]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':2,'Seek':6,'ReadBufferFromFileDescriptorRead':16,'ReadBufferFromFileDescriptorReadBytes':31464,'ReadCompressedBytes':25892,'CompressedReadBufferBlocks':82,'CompressedReadBufferBytes':116215,'IOBufferAllocs':8,'IOBufferAllocBytes':46860,'FunctionExecute':56,'MarkCacheHits':4,'CreatedReadBufferOrdinary':4,'SelectedParts':2,'SelectedRanges':2,'SelectedMarks':2,'SelectedRows':83,'SelectedBytes':133125,'ContextLock':370,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':13096,'UserTimeMicroseconds':9503,'SystemTimeMicroseconds':195,'SoftPageFaults':23,'OSCPUWaitMicroseconds':1380,'OSCPUVirtualTimeMicroseconds':9661,'OSWriteBytes':4096,'OSReadChars':33567,'OSWriteChars':8310}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 9:
───────
type: QueryFinish
query_start_time: 2021-12-25 15:25:01
query_duration_ms: 8
query_id: a3d717fd-c43f-4723-a18d-557c733299f6
query_kind: Select
is_initial_query: 1
query: SELECT
name,
engine,
tables,
partitions,
parts,
formatReadableSize(bytes_on_disk) "disk_size"
FROM system.databases db
LEFT JOIN
(
SELECT
database,
uniq(table) "tables",
uniq(table, partition) "partitions",
count() AS parts,
sum(bytes_on_disk) "bytes_on_disk"
FROM system.parts
WHERE active
GROUP BY database
) AS db_stats ON db.name = db_stats.database
ORDER BY bytes_on_disk DESC
LIMIT 10 FORMAT PrettyCompactNoEscapes
read: 9 rows / 845.00 B
written: 0 rows / 0.00 B
result: 4 rows / 640.00 B
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.databases','system.parts']
columns: ['system.databases.engine','system.databases.name','system.parts.active','system.parts.bytes_on_disk','system.parts.database','system.parts.partition','system.parts.table']
used_aggregate_functions: ['count','sum','uniq']
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['PrettyCompactNoEscapes']
used_functions: ['formatReadableSize']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'ArenaAllocChunks':5,'ArenaAllocBytes':20480,'FunctionExecute':1,'SelectedRows':9,'SelectedBytes':845,'ContextLock':69,'RWLockAcquiredReadLocks':6,'RealTimeMicroseconds':9090,'UserTimeMicroseconds':4654,'SystemTimeMicroseconds':1171,'SoftPageFaults':8,'HardPageFaults':2,'OSCPUWaitMicroseconds':2126,'OSCPUVirtualTimeMicroseconds':5824,'OSReadBytes':212992,'OSWriteBytes':4096,'OSReadChars':427,'OSWriteChars':8936}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 10:
───────
type: QueryFinish
query_start_time: 2021-12-25 15:26:26
query_duration_ms: 7
query_id: 49305759-0f08-4d5a-81d8-c1a11cfc0eb4
query_kind: Select
is_initial_query: 1
query: SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY memory_usage DESC
LIMIT 10 FORMAT Vertical
read: 40 rows / 67.42 KiB
written: 0 rows / 0.00 B
result: 10 rows / 57.95 KiB
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.query_log']
columns: ['system.query_log.ProfileEvents','system.query_log.Settings','system.query_log.client_hostname','system.query_log.client_name','system.query_log.client_version_major','system.query_log.client_version_minor','system.query_log.client_version_patch','system.query_log.columns','system.query_log.databases','system.query_log.event_date','system.query_log.event_time','system.query_log.exception','system.query_log.http_user_agent','system.query_log.initial_user','system.query_log.is_initial_query','system.query_log.memory_usage','system.query_log.query','system.query_log.query_duration_ms','system.query_log.query_id','system.query_log.query_kind','system.query_log.query_start_time','system.query_log.read_bytes','system.query_log.read_rows','system.query_log.result_bytes','system.query_log.result_rows','system.query_log.stack_trace','system.query_log.tables','system.query_log.thread_ids','system.query_log.type','system.query_log.used_aggregate_function_combinators','system.query_log.used_aggregate_functions','system.query_log.used_data_type_families','system.query_log.used_database_engines','system.query_log.used_dictionaries','system.query_log.used_formats','system.query_log.used_functions','system.query_log.used_storages','system.query_log.used_table_functions','system.query_log.user','system.query_log.written_bytes','system.query_log.written_rows']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['Vertical']
used_functions: ['empty','and','now','concat','today','toIntervalDay','formatReadableSize','minus','greaterOrEquals','multiIf','toString','subtractDays','notEquals']
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'FileOpen':1,'Seek':3,'ReadBufferFromFileDescriptorRead':8,'ReadBufferFromFileDescriptorReadBytes':14777,'ReadCompressedBytes':12855,'CompressedReadBufferBlocks':41,'CompressedReadBufferBytes':61376,'IOBufferAllocs':4,'IOBufferAllocBytes':24498,'FunctionExecute':28,'MarkCacheHits':2,'CreatedReadBufferOrdinary':2,'DiskReadElapsedMicroseconds':16,'SelectedParts':1,'SelectedRanges':1,'SelectedMarks':1,'SelectedRows':40,'SelectedBytes':69039,'ContextLock':342,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':9159,'UserTimeMicroseconds':4713,'SystemTimeMicroseconds':1942,'SoftPageFaults':19,'OSCPUWaitMicroseconds':2421,'OSCPUVirtualTimeMicroseconds':6655,'OSWriteBytes':4096,'OSReadChars':15215,'OSWriteChars':7278}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
```
##### Top 10 queries by memory usage
**query**
```sql
SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
ORDER BY memory_usage DESC
LIMIT 10
```
**result**
```
Row 1:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:26:25
query_duration_ms: 0
query_id: c6b6a96c-d5c5-4406-98cd-80857a8412d4
query_kind:
is_initial_query: 1
query: SHOW ACCESS FORMAT TSVRaw
read: 5 rows / 405.00 B
written: 0 rows / 0.00 B
result: 5 rows / 4.50 KiB
memory usage: 1.82 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: []
tables: []
columns: []
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TSVRaw']
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: [66,283,225,281]
ProfileEvents: {'Query':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':5,'SelectedBytes':405,'ContextLock':8,'RealTimeMicroseconds':959,'UserTimeMicroseconds':452,'SystemTimeMicroseconds':238,'OSCPUWaitMicroseconds':90,'OSCPUVirtualTimeMicroseconds':690,'OSWriteBytes':4096,'OSReadChars':846,'OSWriteChars':880}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 2:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 2
query_id: 253362ba-40a1-4593-a4cc-30d3dfdfe0ab
query_kind:
is_initial_query: 1
query: SHOW ACCESS FORMAT TSVRaw
read: 5 rows / 405.00 B
written: 0 rows / 0.00 B
result: 5 rows / 4.50 KiB
memory usage: 1.82 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: []
tables: []
columns: []
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TSVRaw']
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: [66,225,283,282]
ProfileEvents: {'Query':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':5,'SelectedBytes':405,'ContextLock':8,'RealTimeMicroseconds':4687,'UserTimeMicroseconds':2171,'SystemTimeMicroseconds':1264,'OSCPUWaitMicroseconds':513,'OSCPUVirtualTimeMicroseconds':3335,'OSReadChars':848,'OSWriteChars':880}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 3:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:25:01
query_duration_ms: 1
query_id: 61b20c8c-ca63-4384-adb4-ce7765d77389
query_kind:
is_initial_query: 1
query: SHOW ACCESS FORMAT TSVRaw
read: 5 rows / 405.00 B
written: 0 rows / 0.00 B
result: 5 rows / 4.50 KiB
memory usage: 1.82 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: []
tables: []
columns: []
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TSVRaw']
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: [66,225,281,283]
ProfileEvents: {'Query':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':5,'SelectedBytes':405,'ContextLock':8,'RealTimeMicroseconds':3442,'UserTimeMicroseconds':715,'SystemTimeMicroseconds':485,'SoftPageFaults':1,'OSCPUWaitMicroseconds':443,'OSCPUVirtualTimeMicroseconds':1170,'OSReadChars':833,'OSWriteChars':880}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 4:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:26:25
query_duration_ms: 1
query_id: 13ebdab7-e368-4f9f-b47e-023dbd9e91ce
query_kind: Select
is_initial_query: 1
query:
SELECT formatReadableTimeDelta(uptime())
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.49 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['uptime','formatReadableTimeDelta']
used_storages: []
used_table_functions: []
thread_ids: [66,283,282,225,281]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':17,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':1613,'UserTimeMicroseconds':708,'SystemTimeMicroseconds':274,'SoftPageFaults':3,'OSCPUWaitMicroseconds':2,'OSCPUVirtualTimeMicroseconds':980,'OSReadChars':846,'OSWriteChars':1190}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 5:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 2
query_id: ff330183-854b-46bc-a548-30e12a7bee9c
query_kind: Select
is_initial_query: 1
query:
SELECT formatReadableTimeDelta(uptime())
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.49 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['formatReadableTimeDelta','uptime']
used_storages: []
used_table_functions: []
thread_ids: [66,225,283,281,282]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':17,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':4372,'UserTimeMicroseconds':1022,'SystemTimeMicroseconds':177,'OSCPUWaitMicroseconds':2070,'OSCPUVirtualTimeMicroseconds':1198,'OSWriteBytes':4096,'OSReadChars':848,'OSWriteChars':1190}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 6:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:25:01
query_duration_ms: 3
query_id: b763c2f9-6234-47f7-8b30-43d619909289
query_kind: Select
is_initial_query: 1
query:
SELECT formatReadableTimeDelta(uptime())
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.49 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['uptime','formatReadableTimeDelta']
used_storages: []
used_table_functions: []
thread_ids: [66,225,281,283,282]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':17,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':6367,'UserTimeMicroseconds':3329,'SystemTimeMicroseconds':531,'SoftPageFaults':6,'HardPageFaults':1,'OSCPUWaitMicroseconds':1090,'OSCPUVirtualTimeMicroseconds':3859,'OSReadBytes':102400,'OSReadChars':830,'OSWriteChars':1190}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 7:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:26:25
query_duration_ms: 1
query_id: e9c25bd1-00d3-4239-9611-1c3d391178da
query_kind: Select
is_initial_query: 1
query: SELECT version()
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.45 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['version']
used_storages: []
used_table_functions: []
thread_ids: [66,283,225,282]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':15,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':2720,'UserTimeMicroseconds':648,'SystemTimeMicroseconds':1144,'OSCPUWaitMicroseconds':110,'OSCPUVirtualTimeMicroseconds':1790,'OSReadChars':845,'OSWriteChars':1140}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 8:
──────
type: QueryFinish
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 4
query_id: 69762642-8a75-4149-aaf5-bc1969558747
query_kind: Select
is_initial_query: 1
query: SELECT version()
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.45 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['version']
used_storages: []
used_table_functions: []
thread_ids: [66,282,283]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':15,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':10137,'UserTimeMicroseconds':6289,'SystemTimeMicroseconds':47,'SoftPageFaults':2,'HardPageFaults':1,'OSCPUWaitMicroseconds':859,'OSCPUVirtualTimeMicroseconds':6336,'OSReadBytes':12288,'OSReadChars':845,'OSWriteChars':1140}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 9:
───────
type: QueryFinish
query_start_time: 2021-12-25 15:25:01
query_duration_ms: 4
query_id: 9e31242c-62c5-4bb1-9a3e-f96e99f3bddf
query_kind: Select
is_initial_query: 1
query: SELECT version()
read: 1 rows / 1.00 B
written: 0 rows / 0.00 B
result: 1 rows / 128.00 B
memory usage: 1.45 KiB
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.one']
columns: ['system.one.dummy']
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['TabSeparated']
used_functions: ['version']
used_storages: []
used_table_functions: []
thread_ids: [66,225,282,281,283]
ProfileEvents: {'Query':1,'SelectQuery':1,'IOBufferAllocs':3,'IOBufferAllocBytes':3145728,'SelectedRows':1,'SelectedBytes':1,'ContextLock':15,'RWLockAcquiredReadLocks':1,'RealTimeMicroseconds':8688,'UserTimeMicroseconds':3598,'SystemTimeMicroseconds':1288,'SoftPageFaults':42,'HardPageFaults':1,'OSCPUWaitMicroseconds':214,'OSCPUVirtualTimeMicroseconds':4885,'OSReadBytes':98304,'OSReadChars':818,'OSWriteChars':1140}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
Row 10:
───────
type: QueryFinish
query_start_time: 2021-12-25 15:26:26
query_duration_ms: 2
query_id: de1fc64c-09c3-420a-8801-a2f9f04407cd
query_kind: Select
is_initial_query: 1
query: SELECT
database,
table,
count() "partitions",
sum(part_count) "parts",
max(part_count) "max_parts_per_partition"
FROM
(
SELECT
database,
table,
partition,
count() "part_count"
FROM system.parts
WHERE active
GROUP BY database, table, partition
) partitions
GROUP BY database, table
ORDER BY max_parts_per_partition DESC
LIMIT 10 FORMAT PrettyCompactNoEscapes
read: 12 rows / 643.00 B
written: 0 rows / 0.00 B
result: 6 rows / 752.00 B
memory usage: 0.00 B
exception:
stack_trace:
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: ['system']
tables: ['system.parts']
columns: ['system.parts.active','system.parts.database','system.parts.partition','system.parts.table']
used_aggregate_functions: ['count','max','sum']
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: ['PrettyCompactNoEscapes']
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: [66]
ProfileEvents: {'Query':1,'SelectQuery':1,'ArenaAllocChunks':2,'ArenaAllocBytes':8192,'SelectedRows':12,'SelectedBytes':643,'ContextLock':58,'RWLockAcquiredReadLocks':9,'RWLockReadersWaitMilliseconds':1,'RealTimeMicroseconds':2924,'UserTimeMicroseconds':1583,'SystemTimeMicroseconds':892,'SoftPageFaults':6,'OSCPUVirtualTimeMicroseconds':3423,'OSReadChars':438,'OSWriteChars':5086}
Settings: {'load_balancing':'random','max_memory_usage':'10000000000'}
```
##### Last 10 failed queries
**query**
```sql
SELECT
type,
query_start_time,
query_duration_ms,
query_id,
query_kind,
is_initial_query,
query,
concat(toString(read_rows), ' rows / ', formatReadableSize(read_bytes)) AS read,
concat(toString(written_rows), ' rows / ', formatReadableSize(written_bytes)) AS written,
concat(toString(result_rows), ' rows / ', formatReadableSize(result_bytes)) AS result,
formatReadableSize(memory_usage) AS "memory usage",
exception,
'\n' || stack_trace AS stack_trace,
user,
initial_user,
multiIf(empty(client_name), http_user_agent, concat(client_name, ' ', toString(client_version_major), '.', toString(client_version_minor), '.', toString(client_version_patch))) AS client,
client_hostname,
databases,
tables,
columns,
used_aggregate_functions,
used_aggregate_function_combinators,
used_database_engines,
used_data_type_families,
used_dictionaries,
used_formats,
used_functions,
used_storages,
used_table_functions,
thread_ids,
ProfileEvents,
Settings
FROM system.query_log
WHERE type != 'QueryStart'
AND event_date >= today() - 1
AND event_time >= now() - INTERVAL 1 DAY
AND exception != ''
ORDER BY query_start_time DESC
LIMIT 10
```
**result**
```
Row 1:
──────
type: ExceptionBeforeStart
query_start_time: 2021-12-25 15:33:29
query_duration_ms: 0
query_id: 323743ef-4dff-4ed3-9559-f405c64fbd4a
query_kind: Select
is_initial_query: 1
query: SELECT
'\n' || arrayStringConcat(
arrayMap(
x,
y -> concat(x, ': ', y),
arrayMap(x -> addressToLine(x), trace),
arrayMap(x -> demangle(addressToSymbol(x)), trace)),
'\n') AS trace
FROM system.stack_trace FORMAT Vertical
read: 0 rows / 0.00 B
written: 0 rows / 0.00 B
result: 0 rows / 0.00 B
memory usage: 0.00 B
exception: Code: 446. DB::Exception: default: Introspection functions are disabled, because setting 'allow_introspection_functions' is set to 0: While processing concat('\n', arrayStringConcat(arrayMap((x, y) -> concat(x, ': ', y), arrayMap(x -> addressToLine(x), trace), arrayMap(x -> demangle(addressToSymbol(x)), trace)), '\n')) AS trace. (FUNCTION_NOT_ALLOWED) (version 21.11.8.4 (official build))
stack_trace:
0. DB::Exception::Exception(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int, bool) @ 0x9b682d4 in /usr/bin/clickhouse
1. bool DB::ContextAccess::checkAccessImplHelper<true, false>(DB::AccessFlags const&) const::'lambda'(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int)::operator()(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, int) const @ 0x119786bc in /usr/bin/clickhouse
2. bool DB::ContextAccess::checkAccessImplHelper<true, false>(DB::AccessFlags const&) const @ 0x11977416 in /usr/bin/clickhouse
3. DB::Context::checkAccess(DB::AccessFlags const&) const @ 0x11eb2f08 in /usr/bin/clickhouse
4. ? @ 0xf96aefb in /usr/bin/clickhouse
5. DB::FunctionFactory::tryGetImpl(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::shared_ptr<DB::Context const>) const @ 0x118f74b4 in /usr/bin/clickhouse
6. DB::FunctionFactory::getImpl(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::shared_ptr<DB::Context const>) const @ 0x118f71fc in /usr/bin/clickhouse
7. DB::ActionsMatcher::visit(DB::ASTFunction const&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120c3abf in /usr/bin/clickhouse
8. DB::ActionsMatcher::visit(DB::ASTFunction const&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120c6b9f in /usr/bin/clickhouse
9. DB::ActionsMatcher::visit(DB::ASTFunction const&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120c41ed in /usr/bin/clickhouse
10. DB::ActionsMatcher::visit(DB::ASTFunction const&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120c41ed in /usr/bin/clickhouse
11. DB::ActionsMatcher::visit(DB::ASTFunction const&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120c41ed in /usr/bin/clickhouse
12. DB::ActionsMatcher::visit(DB::ASTExpressionList&, std::__1::shared_ptr<DB::IAST> const&, DB::ActionsMatcher::Data&) @ 0x120ca818 in /usr/bin/clickhouse
13. DB::InDepthNodeVisitor<DB::ActionsMatcher, true, false, std::__1::shared_ptr<DB::IAST> const>::visit(std::__1::shared_ptr<DB::IAST> const&) @ 0x12099bb7 in /usr/bin/clickhouse
14. DB::ExpressionAnalyzer::getRootActions(std::__1::shared_ptr<DB::IAST> const&, bool, std::__1::shared_ptr<DB::ActionsDAG>&, bool) @ 0x120999cb in /usr/bin/clickhouse
15. DB::SelectQueryExpressionAnalyzer::appendSelect(DB::ExpressionActionsChain&, bool) @ 0x120a4409 in /usr/bin/clickhouse
16. DB::ExpressionAnalysisResult::ExpressionAnalysisResult(DB::SelectQueryExpressionAnalyzer&, std::__1::shared_ptr<DB::StorageInMemoryMetadata const> const&, bool, bool, bool, std::__1::shared_ptr<DB::FilterDAGInfo> const&, DB::Block const&) @ 0x120a9070 in /usr/bin/clickhouse
17. DB::InterpreterSelectQuery::getSampleBlockImpl() @ 0x1232fd0d in /usr/bin/clickhouse
18. ? @ 0x12328864 in /usr/bin/clickhouse
19. DB::InterpreterSelectQuery::InterpreterSelectQuery(std::__1::shared_ptr<DB::IAST> const&, std::__1::shared_ptr<DB::Context const>, std::__1::optional<DB::Pipe>, std::__1::shared_ptr<DB::IStorage> const&, DB::SelectQueryOptions const&, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&, std::__1::shared_ptr<DB::StorageInMemoryMetadata const> const&, std::__1::unordered_map<DB::PreparedSetKey, std::__1::shared_ptr<DB::Set>, DB::PreparedSetKey::Hash, std::__1::equal_to<DB::PreparedSetKey>, std::__1::allocator<std::__1::pair<DB::PreparedSetKey const, std::__1::shared_ptr<DB::Set> > > >) @ 0x123232c7 in /usr/bin/clickhouse
20. DB::InterpreterSelectQuery::InterpreterSelectQuery(std::__1::shared_ptr<DB::IAST> const&, std::__1::shared_ptr<DB::Context const>, DB::SelectQueryOptions const&, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) @ 0x12321c54 in /usr/bin/clickhouse
21. DB::InterpreterSelectWithUnionQuery::buildCurrentChildInterpreter(std::__1::shared_ptr<DB::IAST> const&, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) @ 0x12547fa2 in /usr/bin/clickhouse
22. DB::InterpreterSelectWithUnionQuery::InterpreterSelectWithUnionQuery(std::__1::shared_ptr<DB::IAST> const&, std::__1::shared_ptr<DB::Context const>, DB::SelectQueryOptions const&, std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) @ 0x12546680 in /usr/bin/clickhouse
23. DB::InterpreterFactory::get(std::__1::shared_ptr<DB::IAST>&, std::__1::shared_ptr<DB::Context>, DB::SelectQueryOptions const&) @ 0x122c6216 in /usr/bin/clickhouse
24. ? @ 0x1277dd26 in /usr/bin/clickhouse
25. DB::executeQuery(DB::ReadBuffer&, DB::WriteBuffer&, bool, std::__1::shared_ptr<DB::Context>, std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>, std::__1::optional<DB::FormatSettings> const&) @ 0x12781319 in /usr/bin/clickhouse
26. DB::HTTPHandler::processQuery(DB::HTTPServerRequest&, DB::HTMLForm&, DB::HTTPServerResponse&, DB::HTTPHandler::Output&, std::__1::optional<DB::CurrentThread::QueryScope>&) @ 0x130c20fa in /usr/bin/clickhouse
27. DB::HTTPHandler::handleRequest(DB::HTTPServerRequest&, DB::HTTPServerResponse&) @ 0x130c6760 in /usr/bin/clickhouse
28. DB::HTTPServerConnection::run() @ 0x1312b5e8 in /usr/bin/clickhouse
29. Poco::Net::TCPServerConnection::start() @ 0x15d682cf in /usr/bin/clickhouse
30. Poco::Net::TCPServerDispatcher::run() @ 0x15d6a6c1 in /usr/bin/clickhouse
31. Poco::PooledThread::run() @ 0x15e7f069 in /usr/bin/clickhouse
user: default
initial_user: default
client: python-requests/2.26.0
client_hostname:
databases: []
tables: []
columns: []
used_aggregate_functions: []
used_aggregate_function_combinators: []
used_database_engines: []
used_data_type_families: []
used_dictionaries: []
used_formats: []
used_functions: []
used_storages: []
used_table_functions: []
thread_ids: []
ProfileEvents: {}
Settings: {}
```
#### Stack traces
**query**
```sql
SELECT
'\n' || arrayStringConcat(
arrayMap(
x,
y -> concat(x, ': ', y),
arrayMap(x -> addressToLine(x), trace),
arrayMap(x -> demangle(addressToSymbol(x)), trace)),
'\n') AS trace
FROM system.stack_trace
```
**result**
```
ClickhouseError("Code: 446. DB::Exception: default: Introspection functions are disabled, because setting 'allow_introspection_functions' is set to 0: While processing concat('\\n', arrayStringConcat(arrayMap((x, y) -> concat(x, ': ', y), arrayMap(x -> addressToLine(x), trace), arrayMap(x -> demangle(addressToSymbol(x)), trace)), '\\n')) AS trace. (FUNCTION_NOT_ALLOWED) (version 21.11.8.4 (official build))",)
```
#### uname
**command**
```
uname -a
```
**result**
```
Linux clickhouse01 5.10.76-linuxkit #1 SMP Mon Nov 8 10:21:19 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
```
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