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Add a notice for pd configuration (#12674) #18724

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7 changes: 7 additions & 0 deletions pd-configuration-file.md
Original file line number Diff line number Diff line change
Expand Up @@ -252,6 +252,13 @@ pd-server 相关配置项。

调度相关的配置项。

> **注意:**
>
> 要修改与调度相关的 PD 配置项,请根据集群的情况选择以下方法之一:
>
> - 对于新部署集群,你可以直接在 PD 配置文件中进行修改。
> - 对于已有集群,请使用命令行工具 [PD Control](/pd-control.md) 进行修改。直接修改 PD 配置文件中与调度相关的配置项不会对已有集群生效。

### `max-merge-region-size`

+ 控制 Region Merge 的 size 上限,当 Region Size 大于指定值时 PD 不会将其与相邻的 Region 合并。
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