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