php connection pooling mysql

Question

I am planning to use MYSQL. Is there a connection pooling extension available? Or what is the normal practice for connection? Is this the one used in every where...

Answer 1

Persistent connection support was introduced in PHP 5.3 for the mysqli extension. Support was already present in PDO MYSQL and ext/mysql. The idea behind persistent connections is that a connection between a client process and a database can be reused by a client process, rather than being created and destroyed multiple times. This reduces the overhead of creating fresh connections every time one is required, as unused connections are cached and ready to be reused.

Unlike the mysql extension, mysqli does not provide a separate function for opening persistent connections. To open a persistent connection you must prepend p: to the hostname when connecting.

source: http://www.php.net/manual/en/mysqli.persistconns.php

sample code:
$GLOBALS["mysqli"] = new mysqli('p:localhost', 'username', 'password', 'db_name');

edit: Sorry for the dupe, didn't see the other answers.