mysql调优工具

下载地址:

https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl

直接使用

wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/mysqltuner.pl

下载即可。

chmod +x mysqltuner.pl

./mysqltuner.pl 然后输入用户名和密码即可。

下图是我一台线上服务器的检测结果。

浏览输出的结果，特别是末尾的 Recommendations ，里面一般会提到您需要在 my.cnf 修改的内容。修改 my.cnf 后记得重启 MySQL 。重启后再运行 MySQLTuner 检查。

另外需要注意的是 MySQL 需要启动 24 小时候再运行 MySQLTuner ，不然有些内容会不准。

另外，./mysqltuner.pl --help 能显示支持哪些参数。

Connection and Authentication

--host <hostname>    Connect to a remote host to perform tests (default: localhost)

--socket <socket>    Use a different socket for a local connection

--port <port>        Port to use for connection (default: 3306)

--user <username>    Username to use for authentication

--pass <password>    Password to use for authentication

--defaults-file <path>  Path to a custom .my.cnf

--mysqladmin <path>  Path to a custom mysqladmin executable

--mysqlcmd <path>    Path to a custom mysql executable

--noask              Don‘t ask password if needed

Performance and Reporting Options

--skipsize           Don‘t enumerate tables and their types/sizes (default: on)

(Recommended for servers with many tables)

--skippassword       Don‘t perform checks on user passwords(default: off)

--checkversion       Check for updates to MySQLTuner (default: don‘t check)

--updateversion      Check for updates to MySQLTuner and update when newer version is available (default: don‘t check)

--forcemem <size>    Amount of RAM installed in megabytes

--forceswap <size>   Amount of swap memory configured in megabytes

--passwordfile <path>Path to a password file list(one password by line)

Output Options:

--silent             Don‘t output anything on screen

--nogood             Remove OK responses

--nobad              Remove negative/suggestion responses

--noinfo             Remove informational responses

--debug              Print debug information

--dbstat             Print database information

--idxstat            Print index information

--sysstat            Print system information

--pfstat             Print Performance schema information

--bannedports        Ports banned separated by comma(,)

--maxportallowed     Number of ports opened allowed on this hosts

--cvefile            CVE File for vulnerability checks

--nocolor            Don‘t print output in color

--json               Print result as JSON string

--prettyjson         Print result as human readable JSON

--buffers            Print global and per-thread buffer values

--outputfile <path>  Path to a output txt file

--reportfile <path>  Path to a report txt file

--template   <path>  Path to a template file

--verbose            Prints out all options (default: no verbose)

例如我有1台服务器，上面跑的是多实例的mysql上面，体检的话，需要使用

./mysqltuner.pl --socket /data/multi_instance/3306/mysql.sock