Mysql pt工具pt-kill怎么用，很多新手對(duì)此不是很清楚，為了幫助大家解決這個(gè)難題，下面小編將為大家詳細(xì)講解，有這方面需求的人可以來(lái)學(xué)習(xí)下，希望你能有所收獲。
pt-kill
概述
從show processlist 中獲取滿足條件的連接或者從包含show processlist的文件中讀取滿足條件的連接并打印或者殺掉或者執(zhí)行其他操作，這個(gè)工具在工作中實(shí)用性很高，當(dāng)服務(wù)器連接出現(xiàn)異常后第一想到的就是pt-kill，自己寫(xiě)一個(gè)腳本也可以，但是功能還是沒(méi)有pt-kill強(qiáng)大；
常用功能介紹
[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 殺掉處于runnning狀態(tài)超過(guò)60s的連接數(shù)；
[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 殺掉處于sleep狀態(tài)的連接數(shù)；
[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 殺掉已經(jīng)sleep達(dá)到60秒的連接數(shù)；
匹配狀態(tài)stat處于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
參數(shù)
–busy-time
運(yùn)行時(shí)間
–idle-time
空閑時(shí)間
–victims
所有匹配的連接，對(duì)應(yīng)有最久的連接
–interval
間隔時(shí)間，默認(rèn)30s，有點(diǎn)長(zhǎng)，可以根據(jù)實(shí)際情況來(lái)調(diào)節(jié)
打印出來(lái)kill掉的連接
–match-command
匹配當(dāng)前連接的命令
Query
Sleep
Binlog Dump
Connect
Delayed insert
Execute
Fetch
Init DB
Kill
Prepare
Processlist
Quit
Reset stmt
Table Dump
–match-state
匹配當(dāng)前連接的狀態(tài)
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
使用正則表達(dá)式匹配符合的sql
–match-db –match-user –match-host
見(jiàn)名知意
常用用法
殺掉空閑鏈接
pt-kill –match-command Sleep –idle-time 5 –host –port –interval –print –kill –victims all
殺掉運(yùn)行時(shí)間超過(guò)5s的鏈接
pt-kill –match-command Query –busy-time 5 –host –port –interval –print –kill –victims all
殺掉匹配某個(gè)規(guī)則的正在運(yùn)行的sql
pt-kill –match-command Query –busy-time 5 –host –port –interval –print –kill –victims all –match-info
殺掉正在進(jìn)行filesort的sql
pt-kill –match-command Query –match-state “Sorting result” busy-time 5 –host –port –interval –print –kill –victims all
殺掉正在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
幾個(gè)重要參數(shù)
--daemonize 放在后臺(tái)以守護(hù)進(jìn)程的形式運(yùn)行； --interval 多久運(yùn)行一次，單位可以是s,m,h，d等默認(rèn)是s --victims 默認(rèn)是oldest,只殺最古老的查詢。這是防止被查殺是不是真的長(zhǎng)時(shí)間運(yùn)行的查詢，他們只是長(zhǎng)期等待。這種種匹配按時(shí)間查詢，殺死一個(gè)時(shí)間最高值。 all 殺掉所有滿足的線程 殺死所有，但最長(zhǎng)的保留不殺 action --kill 殺掉連接并且退出 --kill-query 只殺掉連接執(zhí)行的語(yǔ)句，但是線程不會(huì)被終止 --print 打印滿足條件的語(yǔ)句
QUERY MATCHES--busy-time 批次查詢已運(yùn)行的時(shí)間超過(guò)這個(gè)時(shí)間的線程； --idle-time 殺掉sleep 了多少時(shí)間的連接線程，必須在--match-command sleep時(shí)才有效opition查看參數(shù)吧 Usage: pt-kill [OPTIONS] [DSN] Options: --ask-pass Prompt for a password when connecting to MySQL --charset=s -A Default character set --config=A Read this comma-separated list of config files; if specified, this must be the first option on the command line --create-log-table Create the --log-dsn table if it does not exist --daemonize Fork to the background and detach from the shell --database=s -D The database to use for the connection --defaults-file=s -F Only read mysql options from the given file --filter=s Discard events for which this Perl code doesn't return true --group-by=s Apply matches to each class of queries grouped by this SHOW PROCESSLIST column --help Show help and exit --host=s -h Connect to host (default localhost) --interval=m How often to check for queries to kill. Optional suffix s=seconds, m=minutes, h=hours, d=days; if no suffix, s is used. --log=s Print all output to this file when daemonized --log-dsn=d Store each query killed in this DSN --password=s -p Password to use when connecting --pid=s Create the given PID file --port=i -P Port number to use for connection --query-id Prints an ID of the query that was just killed --rds Denotes the instance in question is on Amazon RDS --run-time=m How long to run before exiting. Optional suffix s= seconds, m=minutes, h=hours, d=days; if no suffix, s is used. --sentinel=s Exit if this file exists (default /tmp/pt-kill- sentinel) --set-vars=A Set the MySQL variables in this comma-separated list of variable=value pairs --socket=s -S Socket file to use for connection --stop Stop running instances by creating the --sentinel file --[no]strip-comments Remove SQL comments from queries in the Info column of the PROCESSLIST (default yes) --user=s -u User for login if not current user --verbose -v Print information to STDOUT about what is being done --version Show version and exit --[no]version-check Check for the latest version of Percona Toolkit, MySQL, and other programs (default yes) --victims=s Which of the matching queries in each class will be killed (default oldest) --wait-after-kill=m Wait after killing a query, before looking for more to kill. Optional suffix s=seconds, m=minutes, h=hours, d=days; if no suffix, s is used. --wait-before-kill=m Wait before killing a query. Optional suffix s= seconds, m=minutes, h=hours, d=days; if no suffix, s is used. Actions: --execute-command=s Execute this command when a query matches --kill Kill the connection for matching queries --kill-query Kill matching queries --print Print a KILL statement for matching queries; does not actually kill queries Class Matches: --any-busy-time=m Match query class if any query has been running for longer than this time. "Longer than" means that if you specify 10, for example, the class will only match if there's at least one query that has been running for greater than 10 seconds. Optional suffix s=seconds, m= minutes, h=hours, d=days; if no suffix, s is used. --each-busy-time=m Match query class if each query has been running for longer than this time. "Longer than" means that if you specify 10, for example, the class will only match if each and every query has been running for greater than 10 seconds. Optional suffix s=seconds, m=minutes, h= hours, d=days; if no suffix, s is used. --query-count=i Match query class if it has at least this many queries Query Matches: --busy-time=m Match queries that have been running for longer than this time. Optional suffix s=seconds, m=minutes, h= hours, d=days; if no suffix, s is used. --idle-time=m Match queries that have been idle/sleeping for longer than this time. Optional suffix s=seconds, m=minutes, h=hours, d=days; if no suffix, s is used. --ignore-command=s Ignore queries whose Command matches this Perl regex --ignore-db=s Ignore queries whose db (database) matches this Perl regex --ignore-host=s Ignore queries whose Host matches this Perl regex --ignore-info=s Ignore queries whose Info (query) matches this Perl regex --[no]ignore-self Don't kill pt-kill's own connection (default yes) --ignore-state=s Ignore queries whose State matches this Perl regex ( default Locked) --ignore-user=s Ignore queries whose user matches this Perl regex --match-all Match all queries that are not ignored --match-command=s Match only queries whose Command matches this Perl regex --match-db=s Match only queries whose db (database) matches this Perl regex --match-host=s Match only queries whose Host matches this Perl regex --match-info=s Match only queries whose Info (query) matches this Perl regex --match-state=s Match only queries whose State matches this Perl regex --match-user=s Match only queries whose User matches this Perl regex --replication-threads Allow matching and killing replication threads --test-matching=a Files with processlist snapshots to test matching options against
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