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HomeDatabaseMysql Tutorialmysqlsla慢查询分析工具使用笔记_MySQL

且该工具自带相似SQL语句去重的功能,能按照指定方式进行排序(比如分析慢查询日志的时候,让其按照SQL语句执行时间逆排序,就能很方便的定位出问题所在)

+ ------------- 安装mysqlsla慢查询日志分析工具 ------------- +

yum -y install perl-ExtUtils-CBuilder perl-ExtUtils-MakeMaker
yum -y install perl-DBI perl-DBD-MySQL
yum -y install perl-CPAN

perl -MCPAN -e shell
进入提示行,输入 yes
进入 CPAN
cpan > install YAML
cpan > install Time::HiRes
# 以上安装有提示东西都输入 yes    

wget http://hackmysql.com/scripts/mysqlsla-2.03.tar.gz
tar xvfz mysqlsla-2.03.tar.gz
cd mysqlsla-2.03
perl Makefile.PL
make && make install

+ ------------------- mysqlsla工具使用介绍 ------------------------- +
基本使用方法:
mysqlsla -lt slow -sort t_sum -top 1000  /tmp/slow_query.log

输出结果类似于

Report for slow logs: slowquery.log
1.59k queries total, 69 unique
Sorted by 't_sum'
Grand Totals: Time 109 s, Lock 0 s, Rows sent 142.02k, Rows Examined 21.26M
______________________________________________________________________ 001 ___
Count : 26 (1.64%)
Time : 6.121513 s total, 235.443 ms avg, 202.917 ms to 311.527 ms max (5.63%)
  95% of Time : 5.538256 s total, 230.761 ms avg, 202.917 ms to 271.056 ms max
Lock Time (s) : 2.407 ms total, 93 µs avg, 84 µs to 139 µs max (1.55%)
  95% of Lock : 2.152 ms total, 90 µs avg, 84 µs to 99 µs max
Rows sent : 0 avg, 0 to 0 max (0.00%)
Rows examined : 153.68k avg, 153.67k to 153.69k max (18.79%)
Database :
Users :
 root@localhost 127.0.0.1 : 100.00% (26) of query, 100.00% (1586) of all users

Query abstract:
SET timestamp=N; SELECT order_pid FROM wfc_delivery WHERE ( order_pid IN (S1) ) AND ( status IN (S3) ) GROUP BY order_pid;

Query sample:
SET timestamp=1387964641;
SELECT `order_pid` FROM `wfc_delivery` WHERE ( `order_pid` IN ('8831') ) AND ( `status` IN ('1','4','24') ) GROUP BY order_pid;

选项说明:
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

mysqlsla常用参数说明:

1) -log-type (-lt) type logs:
通过这个参数来制定log的类型,主要有slow, general, binary, msl, udl,分析slow log时通过制定为slow

2) -sort:
制定使用什么参数来对分析结果进行排序,默认是按照t_sum来进行排序。
t_sum:按总时间排序
c_sum:按总次数排序
c_sum_p: sql语句执行次数占总执行次数的百分比。

3) -top:
显示sql的数量,默认是10,表示按规则取排序的前多少条

4)

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