MySQL数据库慢日志分析工具mysqlsla,一、使用mysqls
MySQL数据库慢日志分析工具mysqlsla,一、使用mysqls
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
# 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%’; ……
格式说明如下：
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.
除了以上的输出, 官方还提供了很多定制化参数, 是一款不可多得的好工具.
附官方网站：http://hackmysql.com/mysqlsla
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