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*: update table name to tidb_background_subtask_history #13033

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Feb 16, 2023
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*: update table name to tidb_background_subtask_history #13033

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2 changes: 1 addition & 1 deletion system-variables.md
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Expand Up @@ -995,7 +995,7 @@ MPP 是 TiFlash 引擎提供的分布式计算框架，允许节点之间的数
- 是否持久化到集群：是
- 默认值：`OFF`
- 这个变量用于控制是否开启分布式执行 DDL reorg 阶段，来提升此阶段的速度。目前此开关只对 `ADD INDEX` 语句有效。开启该变量对于数据量较大的表有一定的性能提升。分布式 DDL 会通过 DDL 动态资源管控，控制 DDL 的 CPU 使用量，来防止对线上业务产生影响。
- 要验证已经完成的 `ADD INDEX` 操作是否使用了此功能，可以查看 `mysql.tidb_ddl_backfill_history` 表是否有对应任务。
- 要验证已经完成的 `ADD INDEX` 操作是否使用了此功能，可以查看 `mysql.tidb_background_subtask_history` 表是否有对应任务。

### `tidb_ddl_error_count_limit`

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