Who maintains persistent connections pool?
I’ve looked a bit at the source code and I understood that mysql_pconnect is a PHP made function and PHP itself is maintaining a pool of connections. It’s not mysql’s built in functionality and PHP only is responsible for maintaining a pool. Which seems legit.
Am I right ?
Slow queries killer?
I’m experiencing some problems with timed out connections.
My my.cnf has a configuration of wait_timeout=5. This is theoretically meant to kill queries that take more then 5 seconds to execute.
With this configuration I feel like I’m not achieving neither the 5 seconds limit per query, nor any benefits from persistent connections.
Could you validate my thoughts and suggest something?
php 5.3.3, mysql 5.1 via mysql ext, no mysqlnd
wait_timeout should only kill idle connections.
To kill long running queries, you’ll have to look into an external script.
The percona toolkit does have a tool that fits with what you want to do: pt-kill