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add system variable tidb_max_auto_analyze_time #8790

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Jun 9, 2022
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add system variable tidb_max_auto_analyze_time #8790

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Expand Up @@ -547,6 +547,15 @@ MPP is a distributed computing framework provided by the TiFlash engine, which a
- Default value: `00:00 +0000`
- This variable is used to restrict the time window that the automatic update of statistics is permitted. For example, to only allow automatic statistics updates between 1AM and 3AM, set `tidb_auto_analyze_start_time='01:00 +0000'` and `tidb_auto_analyze_end_time='03:00 +0000'`.

### `tidb_max_auto_analyze_time` <span class="version-mark"> Introduced from v6.1.0 version </span>
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- Scope: GLOBAL
- Persists to cluster: Yes
- Default value: `43200`
- Range: `[0, 2147483647]`
- Unit: seconds
- This variable is used to specify the maximum execution time of auto ANALYZE tasks. When the execution time of an auto ANALYZE task exceeds the specified time, the task will be terminated. When the value of this variable is `0`, there is no limit to the maximum execution time of Auto ANALYZE tasks.

### tidb_backoff_lock_fast

- Scope: SESSION | GLOBAL
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