Mysql慢查询和慢查询日志分析利器mysqlsla安装使用

时间：2015-01-23 来源：西部数据作者：西部数据

mysqlsl是一个mysql日志分析工具了,下面本文章来给大家介绍mysqlsla工具安装也mysqlsla工具对mysql日志分析详解,有需要了解的朋友可参考一下.

1.安装mysqlsla,代码如下:

wget http://hackmysql.com/scripts/mysqlsla-2.03.tar.gz

tar zvxf mysqlsla-2.03.tar.gz

cd mysqlsla-2.03

perl Makefile.PL

make

make install

perl Makefile.PL会报错,根据出错内容百度下都有相关信息,无非yum install一些东西.

2.使用mysqlsla语法,代码如下:

Slow log: mysqlsla -lt slow slow.log

General log: mysqlsla -lt general general.log

Binary log: mysqlbinlog bin.log | mysqlsla -lt binary -

3.分析日志,代码如下:

./bin/mysqlsla ../slowlog/10.4.1.107.log.1206

分析结果:

Auto-detected logs as slow logs

Report for slow logs: ../slowlog/10.4.1.107.log.1206

799 queries total, 4 unique

Sorted by 't_sum'

Grand Totals: Time 1.25k s, Lock 0 s, Rows sent 917, Rows Examined 426.83M

______________________________________________________________________ 001 ___

Count         : 372  (46.56%)

Time          : 581.404365 s total, 1.562915 s avg, 1.001595 s to 4.129653 s max  (46.56%)

  95% of Time : 516.842801 s total, 1.464144 s avg, 1.001595 s to 2.815608 s max

Lock Time (s) : 40.935 ms total, 110 ?s avg, 71 ?s to 211 ?s max  (44.74%)

  95% of Lock : 38.016 ms total, 108 ?s avg, 71 ?s to 135 ?s max

Rows sent     : 1 avg, 1 to 1 max  (40.57%)

Rows examined : 387.71k avg, 225.34k to 725.90k max  (33.79%)

Database      : yy

Users         :

yyr@ 10.4.1.83 : 33.87% (126) of query, 34.79% (278) of all users

yyr@ 10.4.1.81 : 33.33% (124) of query, 32.79% (262) of all users

yyr@ 10.4.1.82 : 32.80% (122) of query, 32.42% (259) of all users

Query abstract:

SET timestamp=N; SELECT COUNT(N) AS cnt FROM qz_feed WHERE (qz_id='S') AND (feed_key IN (S1)) AND (created>N) AND feed_id IN(SELECT from_id FROM qz_notice WHERE type_detail='S' AND member_id=N AND isnew=N);

//开源代码phpfensi.com

Query sample:

SET timestamp=1354637384;

SELECT COUNT(1) AS cnt FROM qz_feed WHERE (qz_id='377') AND (feed_key in ('speech_add')) AND (created>0) AND feed_id IN(SELECT from_id FROM qz_notice WHERE type_detail='speech_add' AND member_id=38011 AND isnew=1);

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) –statement-filter (-sf) [+-][TYPE]:

过滤sql语句的类型,比如select、update、drop.

[TYPE]有SELECT, CREATE, DROP, UPDATE, INSERT，例如"+SELECT,INSERT",不出现的默认是-,即不包括.

5) db:要处理哪个库的日志.

例如,只取backup库的select语句、按c_sum_p排序的前2条记录,代码如下:

mysqlsla -lt slow -sort c_sum_p -sf "+select" -db backup -top 2 /tmp/127_slow.log

分析后的效果:

______________________________________________________________________ 001 ___

Count : 18 (75.00%)

Time : 15 s total, 833.333 ms avg, 0 to 8 s max (93.75%)

95% of Time : 7 s total, 411.765 ms avg, 0 to 4 s max

Lock Time (s) : 0 total, 0 avg, 0 to 0 max (0.00%)

95% of Lock : 0 total, 0 avg, 0 to 0 max

Rows sent : 0 avg, 0 to 0 max (0.00%)

Rows examined : 116.51k avg, 8 to 1.05M max (99.99%)

Database :

Users :

root@localhost : 100.00% (18) of query, 100.00% (24) of all users

Query abstract:

INSERT INTO t2 SELECT * FROM t2;

Query sample:

insert into t2 select * from t2;