thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-09-29 21:20:49 +00:00
Code Issues Packages Projects Releases Wiki Activity
de23bc1f6d
ClickHouse/docs/zh/operations/system-tables/query_log.md
Yingchun Lai 5d2c3d177e
Update query_log.md
2020-11-03 15:53:44 +08:00

144 lines
11 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
machine_translated: true
machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3
---
# system.query_log {#system_tables-query_log}
包含有关已执行查询的信息，例如，开始时间、处理持续时间、错误消息。
!!! note "注"
此表不包含以下内容的摄取数据 `INSERT` 查询。
您可以更改查询日志记录的设置 [query_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-query-log) 服务器配置部分。
您可以通过设置禁用查询日志记录 [log_queries=0](../../operations/settings/settings.md#settings-log-queries). 我们不建议关闭日志记录，因为此表中的信息对于解决问题很重要。
数据的冲洗周期设置在 `flush_interval_milliseconds` 的参数 [query_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-query-log) 服务器设置部分。 要强制冲洗，请使用 [SYSTEM FLUSH LOGS](../../sql-reference/statements/system.md#query_language-system-flush_logs) 查询。
ClickHouse不会自动从表中删除数据。 看 [导言](../../operations/system-tables/index.md#system-tables-introduction) 欲了解更多详情。
该 `system.query_log` 表注册两种查询:
1. 客户端直接运行的初始查询。
2. 由其他查询启动的子查询（用于分布式查询执行）。 对于这些类型的查询，有关父查询的信息显示在 `initial_*` 列。
每个查询创建一个或两个行中 `query_log` 表，这取决于状态（见 `type` 列）的查询:
1. 如果查询执行成功，则两行具有 `QueryStart` 和 `QueryFinish` 创建类型。
2. 如果在查询处理过程中发生错误，两个事件与 `QueryStart` 和 `ExceptionWhileProcessing` 创建类型。
3. 如果在启动查询之前发生错误，则单个事件具有 `ExceptionBeforeStart` 创建类型。
列:
- `type` ([枚举8](../../sql-reference/data-types/enum.md)) — Type of an event that occurred when executing the query. Values:
- `'QueryStart' = 1` — Successful start of query execution.
- `'QueryFinish' = 2` — Successful end of query execution.
- `'ExceptionBeforeStart' = 3` — Exception before the start of query execution.
- `'ExceptionWhileProcessing' = 4` — Exception during the query execution.
- `event_date` ([日期](../../sql-reference/data-types/date.md)) — Query starting date.
- `event_time` ([日期时间](../../sql-reference/data-types/datetime.md)) — Query starting time.
- `query_start_time` ([日期时间](../../sql-reference/data-types/datetime.md)) — Start time of query execution.
- `query_duration_ms` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Duration of query execution in milliseconds.
- `read_rows` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Total number or rows read from all tables and table functions participated in query. It includes usual subqueries, subqueries for `IN` 和 `JOIN`. 对于分布式查询 `read_rows` 包括在所有副本上读取的行总数。 每个副本发送它的 `read_rows` 值，并且查询的服务器-发起方汇总所有接收到的和本地的值。 缓存卷不会影响此值。
- `read_bytes` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Total number or bytes read from all tables and table functions participated in query. It includes usual subqueries, subqueries for `IN` 和 `JOIN`. 对于分布式查询 `read_bytes` 包括在所有副本上读取的行总数。 每个副本发送它的 `read_bytes` 值，并且查询的服务器-发起方汇总所有接收到的和本地的值。 缓存卷不会影响此值。
- `written_rows` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — For `INSERT` 查询，写入的行数。 对于其他查询，列值为0。
- `written_bytes` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — For `INSERT` 查询时，写入的字节数。 对于其他查询，列值为0。
- `result_rows` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Number of rows in a result of the `SELECT` 查询，或者在一些行 `INSERT` 查询。
- `result_bytes` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — RAM volume in bytes used to store a query result.
- `memory_usage` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Memory consumption by the query.
- `query` ([字符串](../../sql-reference/data-types/string.md)) — Query string.
- `exception` ([字符串](../../sql-reference/data-types/string.md)) — Exception message.
- `exception_code` ([Int32](../../sql-reference/data-types/int-uint.md)) — Code of an exception.
- `stack_trace` ([字符串](../../sql-reference/data-types/string.md)) — [堆栈跟踪](https://en.wikipedia.org/wiki/Stack_trace). 如果查询成功完成，则为空字符串。
- `is_initial_query` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Query type. Possible values:
- 1 — Query was initiated by the client.
- 0 — Query was initiated by another query as part of distributed query execution.
- `user` ([字符串](../../sql-reference/data-types/string.md)) — Name of the user who initiated the current query.
- `query_id` ([字符串](../../sql-reference/data-types/string.md)) — ID of the query.
- `address` ([IPv6](../../sql-reference/data-types/domains/ipv6.md)) — IP address that was used to make the query.
- `port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — The client port that was used to make the query.
- `initial_user` ([字符串](../../sql-reference/data-types/string.md)) — Name of the user who ran the initial query (for distributed query execution).
- `initial_query_id` ([字符串](../../sql-reference/data-types/string.md)) — ID of the initial query (for distributed query execution).
- `initial_address` ([IPv6](../../sql-reference/data-types/domains/ipv6.md)) — IP address that the parent query was launched from.
- `initial_port` ([UInt16](../../sql-reference/data-types/int-uint.md)) — The client port that was used to make the parent query.
- `interface` ([UInt8](../../sql-reference/data-types/int-uint.md)) — Interface that the query was initiated from. Possible values:
- 1 — TCP.
- 2 — HTTP.
- `os_user` ([字符串](../../sql-reference/data-types/string.md)) — Operating system username who runs [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md).
- `client_hostname` ([字符串](../../sql-reference/data-types/string.md)) — Hostname of the client machine where the [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或者运行另一个TCP客户端。
- `client_name` ([字符串](../../sql-reference/data-types/string.md)) — The [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或另一个TCP客户端名称。
- `client_revision` ([UInt32](../../sql-reference/data-types/int-uint.md)) — Revision of the [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或另一个TCP客户端。
- `client_version_major` ([UInt32](../../sql-reference/data-types/int-uint.md)) — Major version of the [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或另一个TCP客户端。
- `client_version_minor` ([UInt32](../../sql-reference/data-types/int-uint.md)) — Minor version of the [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或另一个TCP客户端。
- `client_version_patch` ([UInt32](../../sql-reference/data-types/int-uint.md)) — Patch component of the [ﾂ环板clientｮﾂ嘉ｯﾂ偲](../../interfaces/cli.md) 或另一个TCP客户端版本。
- `http_method` (UInt8) — HTTP method that initiated the query. Possible values:
- 0 — The query was launched from the TCP interface.
- 1 — `GET` 方法被使用。
- 2 — `POST` 方法被使用。
- `http_user_agent` ([字符串](../../sql-reference/data-types/string.md)) — The `UserAgent` http请求中传递的标头。
- `quota_key` ([字符串](../../sql-reference/data-types/string.md)) — The “quota key” 在指定 [配额](../../operations/quotas.md) 设置（见 `keyed`).
- `revision` ([UInt32](../../sql-reference/data-types/int-uint.md)) — ClickHouse revision.
- `thread_numbers` ([数组(UInt32)](../../sql-reference/data-types/array.md)) — Number of threads that are participating in query execution.
- `ProfileEvents.Names` ([数组（字符串)](../../sql-reference/data-types/array.md)) — Counters that measure different metrics. The description of them could be found in the table [系统。活动](../../operations/system-tables/events.md#system_tables-events)
- `ProfileEvents.Values` ([数组(UInt64)](../../sql-reference/data-types/array.md)) — Values of metrics that are listed in the `ProfileEvents.Names` 列。
- `Settings.Names` ([数组（字符串)](../../sql-reference/data-types/array.md)) — Names of settings that were changed when the client ran the query. To enable logging changes to settings, set the `log_query_settings` 参数为1。
- `Settings.Values` ([数组（字符串)](../../sql-reference/data-types/array.md)) — Values of settings that are listed in the `Settings.Names` 列。
**示例**
``` sql
SELECT * FROM system.query_log LIMIT 1 FORMAT Vertical;
```
``` text
Row 1:
──────
type: QueryStart
event_date: 2020-05-13
event_time: 2020-05-13 14:02:28
query_start_time: 2020-05-13 14:02:28
query_duration_ms: 0
read_rows: 0
read_bytes: 0
written_rows: 0
written_bytes: 0
result_rows: 0
result_bytes: 0
memory_usage: 0
query: SELECT 1
exception_code: 0
exception:
stack_trace:
is_initial_query: 1
user: default
query_id: 5e834082-6f6d-4e34-b47b-cd1934f4002a
address: ::ffff:127.0.0.1
port: 57720
initial_user: default
initial_query_id: 5e834082-6f6d-4e34-b47b-cd1934f4002a
initial_address: ::ffff:127.0.0.1
initial_port: 57720
interface: 1
os_user: bayonet
client_hostname: clickhouse.ru-central1.internal
client_name: ClickHouse client
client_revision: 54434
client_version_major: 20
client_version_minor: 4
client_version_patch: 1
http_method: 0
http_user_agent:
quota_key:
revision: 54434
thread_ids: []
ProfileEvents.Names: []
ProfileEvents.Values: []
Settings.Names: ['use_uncompressed_cache','load_balancing','log_queries','max_memory_usage']
Settings.Values: ['0','random','1','10000000000']
```
**另请参阅**
- [system.query_thread_log](../../operations/system-tables/query_thread_log.md#system_tables-query_thread_log) — This table contains information about each query execution thread.
Reference in New Issue View Git Blame Copy Permalink