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Refine slow log description (#18127) #18133

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Jul 26, 2024
Merged

Refine slow log description (#18127) #18133

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f9e4dfd
refine slow log doc
crazycs520 Jul 26, 2024
8aafb46
refien
crazycs520 Jul 26, 2024
3ba350c
Update tidb-configuration-file.md
crazycs520 Jul 26, 2024
09579b8
Update tidb-configuration-file.md
crazycs520 Jul 26, 2024
d66ffd7
refine
crazycs520 Jul 26, 2024
b669148
Update system-variables.md
crazycs520 Jul 26, 2024
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2 changes: 1 addition & 1 deletion system-variables.md
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Expand Up @@ -3140,7 +3140,7 @@ Query OK, 0 rows affected, 1 warning (0.00 sec)
- 默认值：`300`
- 范围：`[-1, 9223372036854775807]`
- 单位：毫秒
- 输出慢日志的耗时阈值。当查询大于这个值，就会当做是一个慢查询，输出到慢查询日志。默认为 300 ms。
- 输出慢日志的耗时阈值，默认为 300 ms。如果查询耗时大于这个值，会视作一个慢查询，并记录到慢查询日志。注意，当日志的输出级别 [`log.level`](/tidb-configuration-file.md#level) 是 `"debug"` 时，所有查询都会记录到慢日志，不受该变量的限制。

### `tidb_slow_query_file`

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4 changes: 2 additions & 2 deletions tidb-configuration-file.md
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Expand Up @@ -278,7 +278,7 @@ TiDB 配置文件比命令行参数支持更多的选项。你可以在 [config/
+ 输出慢日志的耗时阈值。
+ 默认值：300
+ 单位：毫秒
+ 当查询大于这个值，就会当做是一个慢查询，输出到慢查询日志。
+ 如果查询耗时大于这个值，会视作一个慢查询，并记录到慢查询日志。注意，当日志的输出级别 [`log.level`](#level) 是 `"debug"` 时，所有查询都会记录到慢日志，不受该参数的限制。
+ 自 v6.1.0 起，已改用配置项 `instance.tidb_slow_log_threshold` 或系统变量 `tidb_slow_log_threshold` 来设置输出慢日志的耗时阈值。`slow-threshold` 仍可使用，但如果同时设置了 `slow-threshold` 与 `instance.tidb_slow_log_threshold`，TiDB 将采用 `instance.tidb_slow_log_threshold` 的值。

### `record-plan-in-slow-log`
Expand Down Expand Up @@ -807,7 +807,7 @@ TiDB 服务状态相关配置。
+ 默认值：300
+ 范围：`[-1, 9223372036854775807]`
+ 单位：毫秒
+ 当查询大于这个值，就会当做是一个慢查询，输出到慢查询日志。
+ 如果查询耗时大于这个值，会视作一个慢查询，并记录到慢查询日志。注意，当日志的输出级别 [`log.level`](#level) 是 `"debug"` 时，所有查询都会记录到慢日志，不受该参数的限制。
+ 在 v6.1.0 之前，该功能通过配置项 `slow-threshold` 进行设置。

### `tidb_expensive_query_time_threshold`
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