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add warning messages #7016

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Sep 1, 2021
Merged

add warning messages #7016

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8 changes: 8 additions & 0 deletions system-variables.md
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Expand Up @@ -537,6 +537,10 @@ MPP 是 TiFlash 引擎提供的分布式计算框架，允许节点之间的数

### `tidb_enable_cascades_planner`

> **警告：**
>
> 目前 cascades planner 为实验特性，不建议在生产环境中使用。

- 作用域：SESSION | GLOBAL
- 默认值：`OFF`
- 这个变量用于控制是否开启 cascades planner。
Expand Down Expand Up @@ -576,6 +580,10 @@ MPP 是 TiFlash 引擎提供的分布式计算框架，允许节点之间的数

### `tidb_enable_fast_analyze`

> **警告：**
>
> 目前快速分析功能为实验特性，不建议在生产环境中使用。

- 作用域：SESSION | GLOBAL
- 默认值：`OFF`
- 这个变量用来控制是否启用统计信息快速分析功能。默认值 0 表示不开启。
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