How do I kill all the processes in Mysql “show processlist”?

Question

Because I see a lot of processes there, and the \"time\" column shows big values for all of them.

Answer 1

I'd combine bash and mysql:

for i in $(mysql -Ne "select id from information_schema.processlist where user like 'foo%user' and time > 300;"); do
  mysql -e "kill ${i}"
done

Answer 2

login to Mysql as admin:

 mysql -uroot -ppassword;

And than run command:

mysql> show processlist;

You will get something like below :

+----+-------------+--------------------+----------+---------+------+-------+------------------+
| Id | User        | Host               | db       | Command | Time | State | Info             |
+----+-------------+--------------------+----------+---------+------+-------+------------------+
| 49 | application | 192.168.44.1:51718 | XXXXXXXX | Sleep   |  183 |       | NULL             ||
| 55 | application | 192.168.44.1:51769 | XXXXXXXX | Sleep   |  148 |       | NULL             |
| 56 | application | 192.168.44.1:51770 | XXXXXXXX | Sleep   |  148 |       | NULL             |
| 57 | application | 192.168.44.1:51771 | XXXXXXXX | Sleep   |  148 |       | NULL             |
| 58 | application | 192.168.44.1:51968 | XXXXXXXX | Sleep   |   11 |       | NULL             |
| 59 | root        | localhost          | NULL     | Query   |    0 | NULL  | show processlist |
+----+-------------+--------------------+----------+---------+------+-------+------------------+

You will see complete details of different connections. Now you can kill the sleeping connection as below:

mysql> kill 52;
Query OK, 0 rows affected (0.00 sec)

Answer 3

An easy way would be to restart the mysql server.. Open "services.msc" in windows Run, select Mysql from the list. Right click and stop the service. Then Start again and all the processes would have been killed except the one (the default reserved connection)

Answer 4

for python language, you can do like this

import pymysql

connection = pymysql.connect(host='localhost',
                             user='root',
                             db='mysql',
                             cursorclass=pymysql.cursors.DictCursor)

with connection.cursor() as cursor:
    cursor.execute('SHOW PROCESSLIST')
    for item in cursor.fetchall():
        if item.get('Time') > 200:
            _id = item.get('Id')
            print('kill %s' % item)
            cursor.execute('kill %s', _id)
    connection.close()

Answer 5

Or... in shell...

service mysql restart

Yeah, I know, I'm lazy, but it can be handy too.

Answer 6

KILL ALL SELECT QUERIES

select concat('KILL ',id,';') 
from information_schema.processlist 
where user='root' 
  and INFO like 'SELECT%' into outfile '/tmp/a.txt'; 
source /tmp/a.txt;