MySQL--PROFILING基础

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## 查看PROFILING是否开启
SELECT @@profiling


## 开始会话级别PROFILING
SET profiling=1

## 执行要检查的SQL

## 查看捕获的所有SQL
SHOW PROFILES

## 看看特定SQL的执行信息
SHOW PROFILE CPU,BLOCK IO,SWAPS FOR QUERY 1;

##=====================================##
##SHOW PROFILE语法：
SHOW PROFILE [type [, type] ... ]
    [FOR QUERY n]
    [LIMIT row_count [OFFSET offset]]

type:
    ALL
  | BLOCK IO
  | CONTEXT SWITCHES
  | CPU
  | IPC
  | MEMORY
  | PAGE FAULTS
  | SOURCE
  | SWAPS