mysql TIME_WAIT ; too many connections problem

Question

When i was checking for mysql load time on site. i got result showing connections as TIME_WAIT. Even though i close connection on every page. Sometimes the site doesnt load say

Answer 1

If you are getting alot of TIME_WAIT connections on the Mysql Server then that means that Mysql server is closing the connection. The most likely case in this instance would be that a host or several hosts got on a block list. You can clear this by running

mysqladmin flush-hosts

to get a list of the number of connections you have per ip run,

 netstat -nat | awk {'print $5'} | cut -d ":" -f1 | sort | uniq -c | sort -n

you can also confirm this is happening by going to one of your clients that is having trouble connecting and telnet to port 3306. It will thow a message with something like,

telnet mysqlserver 3306
Trying 192.168.1.102...
Connected to mysqlserver.
Escape character is '^]'.
sHost 'clienthost.local' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'Connection closed by foreign host.