1. show variables like \’%profiling%\’;(查看profiling信息)    


 
2. set profiling=1;(开启profiling)


 
3. 执行SQL查询 
例:select goods_name from ecs_goods where goods_id <5000;
 
show  profiles;

 
4. show profile for query 4;


 
show profile 的格式如下:
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 

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