Mysql自带profiling性能分析工具使用分享

摘要：Mysql自带profiling性能分析工具使用分享

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

[img]http://files.jb51.net/file_images/article/201211/201211112154026.jpg[/img]

2. set profiling=1;（开启profiling）

[img]http://files.jb51.net/file_images/article/201211/201211112154027.jpg[/img]

3. 执行SQL查询

例:select goods_name from ecs_goods where goods_id <5000;

show profiles;

[img]http://files.jb51.net/file_images/article/201211/201211112154028.jpg[/img]

4. show profile for query 4;

[img]http://files.jb51.net/file_images/article/201211/201211112154029.jpg[/img]

[b]show profile 的格式如下： [/b]

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