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*: add tidb_auto_analyze_concurrency #18651

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Oct 15, 2024
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*: add tidb_auto_analyze_concurrency #18651

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*: add tidb_auto_analyze_concurrency
hawkingrei Sep 18, 2024
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Oreoxmt Sep 23, 2024
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Update system-variables.md
hawkingrei Sep 24, 2024
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hawkingrei Sep 24, 2024
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10 changes: 10 additions & 0 deletions system-variables.md
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Expand Up @@ -1052,6 +1052,16 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
1 row in set (0.00 sec)
```

### `tidb_auto_analyze_concurrency` <span class="version-mark">从 v8.4.0 版本开始引入</span>

- 作用域：GLOBAL
- 是否持久化到集群：是
- 是否受 Hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value) 控制：否
- 类型：整数型
- 默认值：`1`
- 范围：`[1, 2147483647]`
- 这个变量用来设置单个自动统计信息收集任务内部的并发度。在 v8.4.0 之前的版本中，该并发度固定为 `1`。你可以根据集群资源情况提高该并发度，从而加快统计信息收集任务的执行速度。

### `tidb_auto_analyze_end_time`

- 作用域：GLOBAL
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