The reason for 2000% CPU usage caused by MySQL5.6.12

Top leads to high CPU usage: top

Top: Super high CPU usage: top-16:41:04 up 184 days, 2 users, load average: 19.97, 18.38, 18.36 Tasks: 584 total,

Top:
Top-16:41:04 up 184 days, 2 users, load average: 19.97, 18.38, 18.36
Task: 584 total, 1 running, 583 sleeping, 0 stopped, 0 zombie
Cpu (s): 0.0% us, 0.0% sy, 41.2% ni, 58.7% id, 0.0% wa, 0.0% hi, 0.0% si, 0.0% st
Mem: 65923008 k total, 34622724 k used, 31300284 k free, 315684 k buffers
Swap: 33030136 k total, 0 k used, 33030136 k free, 24200968 k cached

Pid user pr ni virt res shr s % CPU % mem time + COMMAND
28518 root 20 0 1652 m 62 m 1172 S 2014.5 0.1 49701,58 mysql_test
24878 root 20 0 15416 1616 R 896 3.9 0: 00. 02 top
1 root 20 0 19228 1512 S 1220 0.0. 95 init
CPU usage is very high.

[Root @ db-m1-slave-1 ~] # Ps-eaf | grep mysql
Root 24917 24834 0 00:00:00 pts/1 grep mysql
Root 26452, 1 0 2013? 00:00:00/bin/sh/usr/local/mysql/bin/mysqld_safe -- datadir =/home/data/mysql/data -- pid-file =/usr/local/mysql/mysqld. pid
Mysql 27584 26452 0 2013? 01:56:49/usr/local/mysql/bin/mysqld -- basedir =/usr/local/mysql -- datadir =/home/data/mysql/data -- plugin-dir =/usr/local /mysql/lib/plugin -- user = mysql -- log-error =/usr/local/mysql/mysqld. log -- open-files-limit = 8192 -- pid-file =/usr/local/mysql/mysqld. pid -- socket =/usr/local/mysql. sock -- Ports = 3306
Root 28518, 1 99 2013? 2070-22:25:20./mysql_test -- config =./cfg -- threads = 20-B

The./mysql_test script is running. find/-name mysql_test

[Root @ db-m1-slave-1 ~] # Find/-name mysql_test
/Usr/local/mysql/test/mysql_test
[Root @ db-m1-slave-1 ~] #

[Root @ db-m1-slave-1 test] # more mysql_test
* ******* Mysql_test: Not a text file ********

Mysql_test is a plug-in used to collect mysql user information. It is uploaded to the mysql official website. It is a type of software operation information feedback function.
It's okay if you kill it.