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This article is about how MySQL uses pt-kill to kill big SQL. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Download address

Https://www.percona.com/downloads/percona-toolkit/LATEST/

Decompress pt software

# tar xfz percona-toolkit-3.0.2_x86_64.tar.gz

Install the corresponding perl dependency package

# yum install perl-DBI

# yum install perl-DBD-MySQL

# execute a big SQL

> select * from ls_evaluate

# print out statements that take more than 2 seconds to execute

# bin/pt-kill-uroot-pcnstrong#123454321-S / data/mysql01/mysql.sock-- busy-time 2-- print

# 2018-02-12T11:28:04 KILL 30192 (Query 41 sec) select * from ls_evaluate

# 2018-02-12T11:28:05 KILL 30192 (Query 42 sec) select * from ls_evaluate

# 2018-02-12T11:28:06 KILL 30192 (Query 43 sec) select * from ls_evaluate

# kill statements that have been executed for more than 2 seconds

# bin/pt-kill-uroot-pcnstrong#123454321-S / data/mysql01/mysql.sock-- busy-time 2-- kill

# SQL session disconnected

> select * from ls_evaluate

ERROR 2013 (HY000): Lost connection to MySQL server during query

# kill large queries in the database that take more than 30 seconds to execute every 10 seconds

# bin/pt-kill-uroot-pcnstrong#123454321-S / data/mysql01/mysql.sock-busy-time 30-- kill-- interval 10

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