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67 lines
4.0 KiB
Markdown
67 lines
4.0 KiB
Markdown
---
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slug: /en/operations/system-tables/asynchronous_insert_log
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---
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# asynchronous_insert_log
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Contains information about async inserts. Each entry represents an insert query buffered into an async insert query.
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To start logging configure parameters in the [asynchronous_insert_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-asynchronous_insert_log) section.
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The flushing period of data is set in `flush_interval_milliseconds` parameter of the [asynchronous_insert_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-asynchronous_insert_log) server settings section. To force flushing, use the [SYSTEM FLUSH LOGS](../../sql-reference/statements/system.md#query_language-system-flush_logs) query.
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ClickHouse does not delete data from the table automatically. See [Introduction](../../operations/system-tables/index.md#system-tables-introduction) for more details.
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Columns:
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- `hostname` ([LowCardinality(String)](../../sql-reference/data-types/string.md)) — Hostname of the server executing the query.
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- `event_date` ([Date](../../sql-reference/data-types/date.md)) — The date when the async insert happened.
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- `event_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — The date and time when the async insert finished execution.
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- `event_time_microseconds` ([DateTime64](../../sql-reference/data-types/datetime64.md)) — The date and time when the async insert finished execution with microseconds precision.
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- `query` ([String](../../sql-reference/data-types/string.md)) — Query string.
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- `database` ([String](../../sql-reference/data-types/string.md)) — The name of the database the table is in.
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- `table` ([String](../../sql-reference/data-types/string.md)) — Table name.
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- `format` ([String](/docs/en/sql-reference/data-types/string.md)) — Format name.
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- `query_id` ([String](../../sql-reference/data-types/string.md)) — ID of the initial query.
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- `bytes` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Number of inserted bytes.
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- `exception` ([String](../../sql-reference/data-types/string.md)) — Exception message.
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- `status` ([Enum8](../../sql-reference/data-types/enum.md)) — Status of the view. Values:
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- `'Ok' = 1` — Successful insert.
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- `'ParsingError' = 2` — Exception when parsing the data.
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- `'FlushError' = 3` — Exception when flushing the data.
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- `flush_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — The date and time when the flush happened.
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- `flush_time_microseconds` ([DateTime64](../../sql-reference/data-types/datetime64.md)) — The date and time when the flush happened with microseconds precision.
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- `flush_query_id` ([String](../../sql-reference/data-types/string.md)) — ID of the flush query.
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**Example**
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Query:
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``` sql
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SELECT * FROM system.asynchronous_insert_log LIMIT 1 \G;
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```
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Result:
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``` text
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hostname: clickhouse.eu-central1.internal
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event_date: 2023-06-08
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event_time: 2023-06-08 10:08:53
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event_time_microseconds: 2023-06-08 10:08:53.199516
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query: INSERT INTO public.data_guess (user_id, datasource_id, timestamp, path, type, num, str) FORMAT CSV
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database: public
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table: data_guess
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format: CSV
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query_id: b46cd4c4-0269-4d0b-99f5-d27668c6102e
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bytes: 133223
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exception:
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status: Ok
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flush_time: 2023-06-08 10:08:55
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flush_time_microseconds: 2023-06-08 10:08:55.139676
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flush_query_id: cd2c1e43-83f5-49dc-92e4-2fbc7f8d3716
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```
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**See Also**
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- [system.query_log](../../operations/system-tables/query_log.md#system_tables-query_log) — Description of the `query_log` system table which contains common information about queries execution.
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- [system.asynchronous_inserts](../../operations/system-tables/asynchronous_inserts.md#system_tables-asynchronous_inserts) — This table contains information about pending asynchronous inserts in queue.
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