MySQLQueryProfile简单使用

来源：动视网责编：小采时间：2020-11-09 13:19:45

MySQLQueryProfile简单使用

MySQLQueryProfile简单使用:MySQL Query Profile MySQL 5.0.37 以上开始支持 MySQL Query Profiler, 可以查询到此 SQL 会执行多少时间, 并看出 CPU/Memory 使用量, 执行过程中 System lock, Table lock 花多少时间等等. 详细可以参见官方文档：http://dev.my

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导读MySQLQueryProfile简单使用:MySQL Query Profile MySQL 5.0.37 以上开始支持 MySQL Query Profiler, 可以查询到此 SQL 会执行多少时间, 并看出 CPU/Memory 使用量, 执行过程中 System lock, Table lock 花多少时间等等. 详细可以参见官方文档：http://dev.my

MySQL Query Profile MySQL 5.0.37 以上开始支持 MySQL Query Profiler, 可以查询到此 SQL 会执行多少时间, 并看出 CPU/Memory 使用量, 执行过程中 System lock, Table lock 花多少时间等等. 详细可以参见官方文档：http://dev.mysql.com/tech-resources/art

MySQL Query Profile MySQL 5.0.37 以上开始支持 MySQL Query Profiler, 可以查询到此 SQL 会执行多少时间, 并看出 CPU/Memory 使用量, 执行过程中 System lock, Table lock 花多少时间等等.

详细可以参见官方文档：http://dev.mysql.com/tech-resources/articles/using-new-query-profiler.html

启动

mysql> set profiling=1;
Query OK, 0 rows affected (0.00 sec)

测试查询

mysql> select count(*) from client where broker_id=2;
+----------+
| count(*) |
+----------+
| 200 |
+----------+
1 row in set (0.00 sec)

查看profiles

mysql> show profiles;
+----------+------------+-----------------------------------------------+
| Query_ID | Duration | Query |
+----------+------------+-----------------------------------------------+
| 0 | 0.00007300 | set profiling=1 |
| 1 | 0.00044700 | select count(*) from client where broker_id=2 |
+----------+------------+-----------------------------------------------+
2 rows in set (0.00 sec)

查看单条profile

mysql> show profile for query 1;
+--------------------+------------+
| Status | Duration |
+--------------------+------------+
| (initialization) | 0.00006300 |
| Opening tables | 0.00001400 |
| System lock | 0.00000600 |
| Table lock | 0.00001000 |
| init | 0.00002200 |
| optimizing | 0.00001100 |
| statistics | 0.00009300 |
| preparing | 0.00001700 |
| executing | 0.00000700 |
| Sending data | 0.00016800 |
| end | 0.00000700 |
| query end | 0.00000500 |
| freeing items | 0.00001200 |
| closing tables | 0.00000800 |
| logging slow query | 0.00000400 |
+--------------------+------------+
15 rows in set (0.00 sec)
mysql> alter table t engine=myisam;
Query OK, 112050 rows affected (0. sec)
Records: 112050 Duplicates: 0 Warnings: 0
mysql> show profiles;
+----------+------------+-----------------------------------------------+
| Query_ID | Duration | Query |
+----------+------------+-----------------------------------------------+
| 0 | 0.00007300 | set profiling=1 |
| 1 | 0.00044700 | select count(*) from client where broker_id=2 |
| 2 | 0.00003400 | set profiling=0 |
| 3 | 0.00007400 | set profiling=1 |
| 4 | 0.637700 | alter table t engine=myisam |
| 5 | 0.00004000 | set profiling=0 |
+----------+------------+-----------------------------------------------+
6 rows in set (0.00 sec)
mysql> show profile for query 4;
+----------------------+------------+
| Status | Duration |
+----------------------+------------+
| (initialization) | 0.00002900 |
| checking permissions | 0.00000800 |
| init | 0.00004000 |
| Opening table | 0.00009400 |
| System lock | 0.00000500 |
| Table lock | 0.00000700 |
| setup | 0.00004200 |
| creating table | 0.00195800 |
| After create | 0.00010900 |
| copy to tmp table | 0.522500 |
| rename result table | 0.112400 |
| end | 0.00004600 |
| query end | 0.00000700 |
| freeing items | 0.00001300 |
+----------------------+------------+
14 rows in set (0.00 sec)

查看cpu资源等信息

mysql> show profile cpu for query 4;
+----------------------+------------+------------+------------+
| Status | Duration | CPU_user | CPU_system |
+----------------------+------------+------------+------------+
| (initialization) | 0.00002900 | 0.00000000 | 0.00000000 |
| checking permissions | 0.00000800 | 0.00000000 | 0.00000000 |
| init | 0.00004000 | 0.00000000 | 0.00000000 |
| Opening table | 0.00009400 | 0.00100000 | 0.00000000 |
| System lock | 0.00000500 | 0.00000000 | 0.00000000 |
| Table lock | 0.00000700 | 0.00000000 | 0.00000000 |
| setup | 0.00004200 | 0.00000000 | 0.00000000 |
| creating table | 0.00195800 | 0.00000000 | 0.00100000 |
| After create | 0.00010900 | 0.00000000 | 0.00000000 |
| copy to tmp table | 0.522500 | 0.55591600 | 0.04199300 |
| rename result table | 0.112400 | 0.00199900 | 0.00000000 |
| end | 0.00004600 | 0.00000000 | 0.00000000 |
| query end | 0.00000700 | 0.00000000 | 0.00000000 |
| freeing items | 0.00001300 | 0.00000000 | 0.00000000 |
+----------------------+------------+------------+------------+
14 rows in set (0.00 sec)

其他属性列表

ALL - displays all information

BLOCK IO - displays counts for block input and output operations

CONTEXT SWITCHES - displays counts for voluntary and involuntary context switches

IPC - displays counts for messages sent and received

MEMORY - is not currently implemented

PAGE FAULTS - displays counts for major and minor page faults

SOURCE - displays the names of functions from the source code, together with the name and line number of the file in which the function occurs

SWAPS - displays swap counts

设定profiling保存size

mysql> show variables where variable_name='profiling_history_size'; # 默认15条

关闭

mysql> set profiling=0;

原文地址：MySQL Query Profile 简单使用, 感谢原作者分享。

MySQLQueryProfile简单使用

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