--- machine_translated: true machine_translated_rev: 5decc73b5dc60054f19087d3690c4eb99446a6c3 --- # 系统。query\_thread\_log {#system_tables-query_thread_log} 包含有关执行查询的线程的信息，例如，线程名称、线程开始时间、查询处理的持续时间。 开始记录: 1. 在配置参数 [query\_thread\_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-query_thread_log) 科。 2. 设置 [log\_query\_threads](../../operations/settings/settings.md#settings-log-query-threads) 到1。 数据的冲洗周期设置在 `flush_interval_milliseconds` 的参数 [query\_thread\_log](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-query_thread_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。 列: - `event_date` ([日期](../../sql-reference/data-types/date.md)) — The date when the thread has finished execution of the query. - `event_time` ([日期时间](../../sql-reference/data-types/datetime.md)) — The date and time when the thread has finished execution of the query. - `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. - `read_rows` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Number of read rows. - `read_bytes` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Number of read bytes. - `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。 - `memory_usage` ([Int64](../../sql-reference/data-types/int-uint.md)) — The difference between the amount of allocated and freed memory in context of this thread. - `peak_memory_usage` ([Int64](../../sql-reference/data-types/int-uint.md)) — The maximum difference between the amount of allocated and freed memory in context of this thread. - `thread_name` ([字符串](../../sql-reference/data-types/string.md)) — Name of the thread. - `thread_number` ([UInt32](../../sql-reference/data-types/int-uint.md)) — Internal thread ID. - `thread_id` ([Int32](../../sql-reference/data-types/int-uint.md)) — thread ID. - `master_thread_id` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — OS initial ID of initial thread. - `query` ([字符串](../../sql-reference/data-types/string.md)) — Query string. - `is_initial_query` ([UInt8](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Query type. Possible values: - 1 — Query was initiated by the client. - 0 — Query was initiated by another query for 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#uint-ranges)) — 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#uint-ranges)) — The client port that was used to make the parent query. - `interface` ([UInt8](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Interface that the query was initiated from. Possible values: - 1 — TCP. - 2 — HTTP. - `os_user` ([字符串](../../sql-reference/data-types/string.md)) — OS's 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](../../sql-reference/data-types/int-uint.md#uint-ranges)) — 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. - `ProfileEvents.Names` ([数组（字符串)](../../sql-reference/data-types/array.md)) — Counters that measure different metrics for this thread. The description of them could be found in the table [系统。活动](#system_tables-events). - `ProfileEvents.Values` ([数组(UInt64)](../../sql-reference/data-types/array.md)) — Values of metrics for this thread that are listed in the `ProfileEvents.Names` 列。 **示例** ``` sql SELECT * FROM system.query_thread_log LIMIT 1 FORMAT Vertical ``` ``` text Row 1: ────── 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: 1 read_bytes: 1 written_rows: 0 written_bytes: 0 memory_usage: 0 peak_memory_usage: 0 thread_name: QueryPipelineEx thread_id: 28952 master_thread_id: 28924 query: SELECT 1 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 ProfileEvents.Names: ['ContextLock','RealTimeMicroseconds','UserTimeMicroseconds','OSCPUWaitMicroseconds','OSCPUVirtualTimeMicroseconds'] ProfileEvents.Values: [1,97,81,5,81] ... ``` **另请参阅** - [系统。query\_log](../../operations/system-tables/query_log.md#system_tables-query_log) — Description of the `query_log` 系统表，其中包含有关查询执行的公共信息。