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performance_schema

更新时间：2026-06-20 15:19:15

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说明

该变量仅用于兼容 MySQL 8.0，相关功能并不支持，可以查询及设置，设置行为不报错但不生效。

功能描述

performance_schema 用于向客户端声明是否支持 performance 信息的查询。

属性说明

属性	描述
参数类型	Bool
默认值	OFF
取值范围	ON：支持 OFF：不支持
生效范围	GLOBAL
是否可修改	是，支持通过 `SET` 语句修改。

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