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mysql性能监控工具Innotop简介及配置

Jun 07, 2016 pm 04:28 PM
1mysqltoolperformancemonitorIntroductionConfiguration

1.innotop安装 参考官网:http://innotop.googlecode.com/svn/html/installing.html # wget http://innotop.googlecode.com/files/innotop-1.9.0.tar.gz# tar -zxvf innotop-1.9.0.tar.gz # cd innotop-1.9.0 安装INNOTOP工具非常简单,其是由PERL写的,当然

1.innotop安装
参考官网:http://innotop.googlecode.com/svn/html/installing.html

# wget http://innotop.googlecode.com/files/innotop-1.9.0.tar.gz
# tar -zxvf innotop-1.9.0.tar.gz 
# cd innotop-1.9.0

安装INNOTOP工具非常简单,其是由PERL写的,当然需要PERL环境和相关的工具包。在安装之前先要确定你的系统安装了Time::HiRes,Term::ReadKey,DBI,DBD::mysql这四个包

# perl -MCPAN -eshell
CPAN> install Time::HiRes
CPAN> install Term::ReadKey
CPAN> install DBI
CPAN> install DBD::mysql

在解压缩后的源码路径下有安装帮助文件,如下:

# perl Makefile.PL

如果没有报错,然后,使用

# make install

这样就安装 innotop,安装之后系统就会多出一个命令,innotop

得到帮助

# innptop --help

参考官网:http://innotop.googlecode.com/svn/html/manual.html

Innotop详解--非常详细:http://wenku.baidu.com/link?url=0cvUfYA5gwKfwvoo1gGPkr9NfK1eZ5UHa3gAhXB-pwlOLQDyH_Y_BN8q5kfIi89Rz_9eGwjJlWmIQBSZ4hOgg0A-w1nGVnbMbrlQwmxGWz_

其中在QUERY LIST中有个SLOW参数,该参数可以在/etc/my.cnf的配置文件中配置使用

它能记录下所有执行超过long_query_time时间的SQL语句, 帮你找到执行慢的SQL, 方便我们对这些SQL进行优化。

-----如何开启mysql慢查询-----

1.首先,进入mysql,输入命令  show variables like '%quer%';

你会看到其中log_slow_queries 的状态为OFF;long_query_time  为10;

2.编辑/etc/my.cnf文件

在[mysqld]下面添加两行:

log-slow-queries = /var/lib/mysql/mysql-slow.log
long_query_time = 3

log-slow-queries为日志存放目录;long_query_time为最大查询秒数(按自己需求设置)。

3.重启服务使配置生效

/etc/init.d/mysqld restart

重新进入数据库查询log_slow_queries状态为ON。

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