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  • windows下mysql5.6.20使用mysqldumpslow.pl分析慢日志

        要想执行mysqldumpslow.pl(这是perl程序),下载perl编译器。

    下载地址:http://pan.baidu.com/s/1i3GLKAp

        就是ActivePerl_5.16.2.3010812913.msi,一步一步安装后,将bin增加环境变量path。


        如今如果一个场景:现场的slow.log拿回来了,要在本地的windows环境上的mysql上分析。怎样处理?

    C:Program FilesMySQLMySQL Server 5.6in>perl mysqldumpslow.pl --help
    Usage: mysqldumpslow [ OPTS... ] [ LOGS... ]
    Parse and summarize the MySQL slow query log. Options are
      --verbose    verbose
      --debug      debug
      --help       write this text to standard output


      -v           verbose
      -d           debug
      -s ORDER     what to sort by (al, at, ar, c, l, r, t), 'at' is default
                    al: average lock time
                    ar: average rows sent
                    at: average query time
                     c: count
                     l: lock time
                     r: rows sent
                     t: query time
      -r           reverse the sort order (largest last instead of first)
      -t NUM       just show the top n queries
      -a           don't abstract all numbers to N and strings to 'S'
      -n NUM       abstract numbers with at least n digits within names
      -g PATTERN   grep: only consider stmts that include this string
      -h HOSTNAME  hostname of db server for *-slow.log filename (can be wildcard),
                   default is '*', i.e. match all
      -i NAME      name of server instance (if using mysql.server startup script)
      -l           don't subtract lock time from total time

    1. -s,排序,c,t,l,r以及ac,at,al,ar各自是依照query次数。时间,lock时间,返回记录排序。加a就是倒序。


    2. -t,top n。跟上数字就是算出top多少条
    3. -g。跟正則表達式。

     C:Program FilesMySQLMySQL Server 5.6in> mysqldumpslow.pl -r -s c -a -t    > E:slow.txt

     假设运行这个会报错,就依照报错信息来,在my.ini中加入一些參数就可以。

    分析的结果在slow.txt中,例如以下:

    Count: 23  Time=505.55s (11627s)  Lock=0.00s (0s)  Rows=30740.8 (707039), username[password]@[10.194.172.41]
      SELECT DISTINCT u.name,o.full_name FROM pub_user u,pub_user_org uo,pub_org o WHERE  u.user_id=uo.user_id
      AND uo.org_id=o.org_id and u.del_flag=N and uo.del_flag=N
      and u.account not like 'S' and u.account not like 'S' group by u.user_id

    Count: 4  Time=375.01s (1500s)  Lock=0.00s (0s)  Rows=10200.3 (40801), username[password]@[10.194.172.41]
      select distinct username,pu.name, po.full_name from pub_login_history as plh
      inner join pub_user as pu on plh.username=pu.user_id
      inner join pub_user_org as puo on pu.user_id=puo.user_id
      inner join pub_org as po on puo.org_id=po.org_id
      where TIMESTAMPDIFF(MINUTE,login_time,logout_time)>=N
      and login_time>'S' and login_time<'S'


    Count: 4(运行了多少次)  Time=375.01s(每次运行的时间) (1500s)(一共运行了多少时间)  Lock=0.00s (0s)(等待锁的时间)  Rows=10200.3(每次返回的记录数) (40801)(总共返回的记录数)username[password]@[10.194.172.41]

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  • 原文地址:https://www.cnblogs.com/liguangsunls/p/6900147.html
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