Check connection related issue of mysql

Check connection issue of mysql #show connection configuration show variables like '%max_connection%'; #Change the limitation of max_connection temporarily set global max_connections=600; #check current status status; #check how many processes running show processlist; #Kill the locked connections for id in `mysqladmin processlist | grep -i locked | awk '{print $1}'` do    mysqladmin kill ${id} done #Run killing sql source kill_thread_id.sql