Mysql pt工具pt-kill怎么用
Mysql pt工具pt-kill怎么用,很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
pt-kill
概述
从show processlist 中获取满足条件的连接或者从包含show processlist的文件中读取满足条件的连接并打印或者杀掉或者执行其他操作,这个工具在工作中实用性很高,当服务器连接出现异常后第一想到的就是pt-kill,自己写一个脚本也可以,但是功能还是没有pt-kill强大;
常用功能介绍
[root@hostnfsd :/root]$ pt-kill --defaults-file=/data/mydata/my_3307.cnf -uroot -p`cat /etc/sqlpass` --busy-time 60 --kill --victims all --interval 10 每隔10s 杀掉处于runnning状态超过60s的连接数;
[root@hostnfsd :/root]$ pt-kill --defaults-file=/data/mydata/my_3307.cnf -uroot -p`cat /etc/sqlpass` --match-command Sleep --kill --victims all --interval 10 每隔10s 杀掉处于sleep状态的连接数;
[root@hostnfsd :/root]$ pt-kill --defaults-file=/data/mydata/my_3307.cnf -uroot -p`cat /etc/sqlpass` --idle-time 60 --kill --victims all --interval 10 每隔10s 杀掉已经sleep达到60秒的连接数;
匹配状态stat处于sendind data的
[root@HaoDai_App_DB01 toolsqldir]# pt-kill --defaults-file=/data/mydata/my_3307.cnf -uroot -p`cat /etc/sqlpass` --match-state Sending --kill --victims all --interval 5
参数
–busy-time
运行时间
–idle-time
空闲时间
–victims
所有匹配的连接,对应有最久的连接
–interval
间隔时间,默认30s,有点长,可以根据实际情况来调节
–print
打印出来kill掉的连接
–match-command
匹配当前连接的命令
Query
Sleep
Binlog Dump
Connect
Delayed insert
Execute
Fetch
Init DB
Kill
Prepare
Processlist
Quit
Reset stmt
Table Dump
–match-state
匹配当前连接的状态
Locked
login
copy to tmp table
Copying to tmp table
Copying to tmp table on disk
Creating tmp table
executing
Reading from net
Sending data
Sorting for order
Sorting result
Table lock
Updating
–match-info
使用正则表达式匹配符合的sql
–match-db –match-user –match-host
见名知意
常用用法
杀掉空闲链接
pt-kill –match-command Sleep –idle-time 5 –host –port –interval –print –kill –victims all
杀掉运行时间超过5s的链接
pt-kill –match-command Query –busy-time 5 –host –port –interval –print –kill –victims all
杀掉匹配某个规则的正在运行的sql
pt-kill –match-command Query –busy-time 5 –host –port –interval –print –kill –victims all –match-info
杀掉正在进行filesort的sql
pt-kill –match-command Query –match-state “Sorting result” busy-time 5 –host –port –interval –print –kill –victims all
杀掉正在Copying to tmp table的sql
pt-kill –match-command Query –match-state “Copying to tmp table” busy-time 5 –host –port –interval –print –kill –victims all
几个重要参数
--daemonize放在后台以守护进程的形式运行;--interval多久运行一次,单位可以是s,m,h,d等默认是s--victims默认是oldest,只杀最古老的查询。这是防止被查杀是不是真的长时间运行的查询,他们只是长期等待。这种种匹配按时间查询,杀死一个时间最高值。all杀掉所有满足的线程杀死所有,但最长的保留不杀action--kill杀掉连接并且退出--kill-query只杀掉连接执行的语句,但是线程不会被终止--print打印满足条件的语句
QUERYMATCHES--busy-time批次查询已运行的时间超过这个时间的线程;--idle-time杀掉sleep了多少时间的连接线程,必须在--match-commandsleep时才有效opition查看参数吧Usage:pt-kill[OPTIONS][DSN]Options:--ask-passPromptforapasswordwhenconnectingtoMySQL--charset=s-ADefaultcharacterset--config=AReadthiscomma-separatedlistofconfigfiles;ifspecified,thismustbethefirstoptiononthecommandline--create-log-tableCreatethe--log-dsntableifitdoesnotexist--daemonizeForktothebackgroundanddetachfromtheshell--database=s-DThedatabasetousefortheconnection--defaults-file=s-FOnlyreadmysqloptionsfromthegivenfile--filter=sDiscardeventsforwhichthisPerlcodedoesn'treturntrue--group-by=sApplymatchestoeachclassofqueriesgroupedbythisSHOWPROCESSLISTcolumn--helpShowhelpandexit--host=s-hConnecttohost(defaultlocalhost)--interval=mHowoftentocheckforqueriestokill.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--log=sPrintalloutputtothisfilewhendaemonized--log-dsn=dStoreeachquerykilledinthisDSN--password=s-pPasswordtousewhenconnecting--pid=sCreatethegivenPIDfile--port=i-PPortnumbertouseforconnection--query-idPrintsanIDofthequerythatwasjustkilled--rdsDenotestheinstanceinquestionisonAmazonRDS--run-time=mHowlongtorunbeforeexiting.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--sentinel=sExitifthisfileexists(default/tmp/pt-kill-sentinel)--set-vars=ASettheMySQLvariablesinthiscomma-separatedlistofvariable=valuepairs--socket=s-SSocketfiletouseforconnection--stopStoprunninginstancesbycreatingthe--sentinelfile--[no]strip-commentsRemoveSQLcommentsfromqueriesintheInfocolumnofthePROCESSLIST(defaultyes)--user=s-uUserforloginifnotcurrentuser--verbose-vPrintinformationtoSTDOUTaboutwhatisbeingdone--versionShowversionandexit--[no]version-checkCheckforthelatestversionofPerconaToolkit,MySQL,andotherprograms(defaultyes)--victims=sWhichofthematchingqueriesineachclasswillbekilled(defaultoldest)--wait-after-kill=mWaitafterkillingaquery,beforelookingformoretokill.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--wait-before-kill=mWaitbeforekillingaquery.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.Actions:--execute-command=sExecutethiscommandwhenaquerymatches--killKilltheconnectionformatchingqueries--kill-queryKillmatchingqueries--printPrintaKILLstatementformatchingqueries;doesnotactuallykillqueriesClassMatches:--any-busy-time=mMatchqueryclassifanyqueryhasbeenrunningforlongerthanthistime."Longerthan"meansthatifyouspecify10,forexample,theclasswillonlymatchifthere'satleastonequerythathasbeenrunningforgreaterthan10seconds.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--each-busy-time=mMatchqueryclassifeachqueryhasbeenrunningforlongerthanthistime."Longerthan"meansthatifyouspecify10,forexample,theclasswillonlymatchifeachandeveryqueryhasbeenrunningforgreaterthan10seconds.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--query-count=iMatchqueryclassifithasatleastthismanyqueriesQueryMatches:--busy-time=mMatchqueriesthathavebeenrunningforlongerthanthistime.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--idle-time=mMatchqueriesthathavebeenidle/sleepingforlongerthanthistime.Optionalsuffixs=seconds,m=minutes,h=hours,d=days;ifnosuffix,sisused.--ignore-command=sIgnorequerieswhoseCommandmatchesthisPerlregex--ignore-db=sIgnorequerieswhosedb(database)matchesthisPerlregex--ignore-host=sIgnorequerieswhoseHostmatchesthisPerlregex--ignore-info=sIgnorequerieswhoseInfo(query)matchesthisPerlregex--[no]ignore-selfDon'tkillpt-kill'sownconnection(defaultyes)--ignore-state=sIgnorequerieswhoseStatematchesthisPerlregex(defaultLocked)--ignore-user=sIgnorequerieswhoseusermatchesthisPerlregex--match-allMatchallqueriesthatarenotignored--match-command=sMatchonlyquerieswhoseCommandmatchesthisPerlregex--match-db=sMatchonlyquerieswhosedb(database)matchesthisPerlregex--match-host=sMatchonlyquerieswhoseHostmatchesthisPerlregex--match-info=sMatchonlyquerieswhoseInfo(query)matchesthisPerlregex--match-state=sMatchonlyquerieswhoseStatematchesthisPerlregex--match-user=sMatchonlyquerieswhoseUsermatchesthisPerlregex--replication-threadsAllowmatchingandkillingreplicationthreads--test-matching=aFileswithprocesslistsnapshotstotestmatchingoptionsagainst
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