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Update system-variables.md
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Co-authored-by: Aolin <[email protected]>
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qiancai and Oreoxmt authored Aug 9, 2024
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Expand Up @@ -2574,7 +2574,7 @@ v5.0 后,用户仍可以单独修改以上系统变量(会有废弃警告)
- 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} ∪ [1, 256]`
- 范围:`-1``[1, 256]`
- 单位:线程
- 该变量用于控制 [GC(垃圾回收)](/garbage-collection-overview.md) 过程中 [Resolve Locks(清理锁)] 和 [Delete Range(删除区间)](/garbage-collection-overview.md#Delete-Ranges删除区间) 的并发线程数。
- 默认情况下,该变量值为 `-1`,TiDB 将根据负载情况自动决定适当的线程数。
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