MySQL数据库慢日志分析工具mysqlsla使用教程

2024-07-24 12:39:36

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mysqlsla是一个慢日志分析工具了,我们可以把慢日志对过mysqlsla进行分析从而得出性能最差的sql语句了,下面我们一起来看看吧,mysqlsla是hackmysql.com推出的一款mysql的日志分析工具,功能非常强大,数据报表,非常有利于分析慢查询的原因,包括执行频率,数据量,查询消耗等.

一、使用 mysqlsla -lt slow mysql-slow.log 或者 mysqlsla -lt slow mysql-slow.log -sf “+SELECT” -db dbName -top 10 -sort t_sum

参数意义

lt:表示日志类型，有slow, general, binary, msl, udl。

sf:[+-][type]，[TYPE]有SELECT, CREATE, DROP, UPDATE, INSERT，例如”+SELECT,INSERT”，不出现的默认是-，即不包括。

db：要处理哪个库的日志。

top:表示取按规则排序的前多少条。

sort:按某种规则排序，t_sum按总时间排序， c_sum按总次数排序。

二、分析结果

总查询次数(queries total),去重后的sql数量(unique),输出报表的内容排序(sorted by),最重大的慢sql统计信息,包括平均执行时间,等待锁时间,结果行的总数,扫描的行总数.

Count,sql的执行次数及占总的slow log数量的百分比.

time,执行时间,包括总时间,平均时间,最小,最大时间,时间占到总慢sql时间的百分比.

95% of Time,去除最快和最慢的sql,覆盖率占95%的sql的执行时间.

Lock Time,等待锁的时间.

95% of Lock,95%的慢sql等待锁时间.

Rows sent,结果行统计数量,包括平均,最小,最大数量.

Rows examined,扫描的行数量.

Database,属于哪个数据库

users,哪个用户,ip,占到所有用户执行的sql百分比

Query abstract,抽象后的sql语句

Query sample,sql语句

三、安装

方法一:从http://hackmysql.com/mysqlsla下载mysqlsla,当前最新版为:2.03

tar zxvf mysqlsla-2.03.tar.gz

cp mysqlsla-2.03/bin/mysqlsla /usr/local/bin

如果提示“Can’t locate DBI.pm”,执行以下命令:

yum install perl-DBI perl-DBD-MySQL -y

这时就可以使用mysqlsla了,用法如下:mysqlsla -lt slow slow.log

方法二:

wgethttp://hackmysql.com/scripts/mysqlsla-2.03.tar.gz

# tar xzvf mysqlsla-2.03.tar.gz

mysqlsla-2.03/

mysqlsla-2.03/Changes

mysqlsla-2.03/INSTALL

mysqlsla-2.03/README

mysqlsla-2.03/Makefile.PL

mysqlsla-2.03/bin/

mysqlsla-2.03/bin/mysqlsla

mysqlsla-2.03/META.yml

mysqlsla-2.03/lib/

mysqlsla-2.03/lib/mysqlsla.pm

mysqlsla-2.03/MANIFEST

# cd mysqlsla-2.03

# ll

总计 68

drwxr-xr-x 2 1000 1000 4096 2008-11-11 bin

-rw-r–r– 1 1000 1000 5630 2008-11-11 Changes

-rw-r–r– 1 1000 1000 394 2008-07-13 INSTALL

drwxr-xr-x 2 1000 1000 4096 2008-11-11 lib

-rw-r–r– 1 1000 1000 389 2008-07-13 Makefile.PL

-rw-r–r– 1 1000 1000 152 2008-07-13 MANIFEST

-rw-r–r– 1 1000 1000 303 2008-11-11 META.yml

-rw-r–r– 1 1000 1000 1969 2008-11-11 README

# less INSTALL

Installing mysqlsla

===================

perl Makefile.PL

make

make install

Depending on your system, the mysqlsla script will be copied to some common bin

directory (/usr/local/bin/ for example). Then you should be able to run it from

the command line like: mysqlsla -lt slow LOG

For quick help, man mysqlsla

For all documentation and guides, visit http://hackmysql.com/mysqlsla

# less Makefile.PL

use 5.008004;

use ExtUtils::MakeMaker;

WriteMakefile(

NAME => ‘mysqlsla’,

VERSION_FROM => ‘lib/mysqlsla.pm’,

PREREQ_PM => {},

($] >= 5.005 ?

(ABSTRACT_FROM => ‘lib/mysqlsla.pm’, # retrieve abstract from module

AUTHOR => ‘Daniel Nichter (http://hackmysql.com/contact)’) : ()),

EXE_FILES => [ 'bin/mysqlsla' ],

);

# perl Makefile.PL

Checking if your kit is complete…

Looks good

Writing Makefile for mysqlsla

# ll

总计 96

drwxr-xr-x 2 1000 1000 4096 2008-11-11 bin

-rw-r–r– 1 1000 1000 5630 2008-11-11 Changes

-rw-r–r– 1 1000 1000 394 2008-07-13 INSTALL

drwxr-xr-x 2 1000 1000 4096 2008-11-11 lib

-rw-r–r– 1 root root 22722 09-08 18:52 Makefile

-rw-r–r– 1 1000 1000 389 2008-07-13 Makefile.PL

-rw-r–r– 1 1000 1000 152 2008-07-13 MANIFEST

-rw-r–r– 1 1000 1000 303 2008-11-11 META.yml

-rw-r–r– 1 1000 1000 1969 2008-11-11 README

--Vevb.com

# make

cp lib/mysqlsla.pm blib/lib/mysqlsla.pm

cp bin/mysqlsla blib/script/mysqlsla

/usr/bin/perl “-MExtUtils::MY” -e “MY->fixin(shift)” blib/script/mysqlsla

Manifying blib/man3/mysqlsla.3pm

# make install

Installing /usr/lib/perl5/site_perl/5.8.8/mysqlsla.pm

Installing /usr/share/man/man3/mysqlsla.3pm

Installing /usr/bin/mysqlsla

Writing /usr/lib/perl5/site_perl/5.8.8/i386-Linux-thread-multi/auto/mysqlsla/.packlist

Appending installation info to /usr/lib/perl5/5.8.8/i386-linux-thread-multi/perllocal.pod

默认将命令mysqlsla安装到/usr/bin目录,执行mysqlsla –help时提示没有安装DBI模块,mysqlsla是用perl写的,第一次通过CPAN安装perl模块时,需要进行相关的配置,大部分配置采用默认值,一路回车即可.

#perl -MCPAN -e Shell

然后在下面的各个询问中可以改已经配置好的选项,然后执行下面的命令保存.

CPAN>reload index

CPAN>reload cpan

安装DBI模块:CPAN>install DBI

如果是第一次以后进入CPAN系统,想修改以前的配置,可以在CPAN命令行(即CPAN>)键入以下指令:

CPAN>o conf init

同时要执行下面的命令保存:

CPAN>reload index

CPAN>reload cpan

man mysqlsla可以看到mysqlsla的相关选项:

# man mysqlsla

XXX

XXX WARNING: old character encoding and/or character set

XXX

mysqlsla(3) User Contributed Perl Documentation mysqlsla(3)

NAME

mysqlsla – Parse, filter, analyze and sort MySQL slow, general and binary logs

SYNOPSIS

# Basic operation: parse a MySQL slow or general log

mysqlsla –log-type slow LOG

mysqlsla –log-type general LOG

# Parse output from mysqlbinlog

# mysqlsla cannot directly parse binary logs

mysqlbinlog LOG │ mysqlsla –log-type binary -

# Parse a microslow patched slow log

mysqlsla –log-type msl LOG

# Replay a replay file

mysqlsla –replay FILE

# Parse a user-defined log specify its format

mysqlsla –log-type udl –udl-format FILE

# Let mysqlsla automatically determine the log type

mysqlsla LOG

DESCRIPTION

mysqlsla parses, filters, analyzes and sorts MySQL slow, general, binary and microslow patched slow logs.

It also supports user-defined logs.

This POD/man page is only a very brief outline of usage and command line options. For the full library of

mysqlsla documentation visithttp://hackmysql.com/mysqlsla.

# mysqlsla /tmp/mysqlslow.log | less

Auto-detected logs as slow logs

Report for slow logs: /tmp/mysqlslow.log

6 queries total, 6 unique

Sorted by ‘t_sum’

Grand Totals: Time 0 s, Lock 0 s, Rows sent 13, Rows Examined 13

______________________________________________________________________ 001 ___

Count : 1 (16.67%)

Time : 2.321 ms total, 2.321 ms avg, 2.321 ms to 2.321 ms max (47.20%)

Lock Time (s) : 629 ?s total, 629 ?s avg, 629 ?s to 629 ?s max (77.75%)

Rows sent : 8 avg, 8 to 8 max (61.54%)

Rows examined : 8 avg, 8 to 8 max (61.54%)

Database :

Users :

root@ 192.168.1.100 : 100.00% (1) of query, 100.00% (6) of all users

Query abstract:

SET timestamp=N; SHOW variables LIKE ‘S’;

Query sample:

SET timestamp=1252395365;

show variables like ‘%character%’;

……