Lack of interest Manual entry "Config.php options": document persistent MySQL connections

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Steffen

Steffen

Well-known member
Licensed customer
I was wondering why I had about 2000 TCP connections in state TIME_WAIT after upgrading from vB4 to XenForo 2. The reason was that XenForo didn't use persistent database connections. Since XenForo uses the PHP extension MySQLi, you can enable persistent connections between PHP and your MySQL server by prepending p: to the hostname (http://php.net/manual/en/mysqli.construct.php). I think this should be documented. :)

Example:
Code: 
$config['db']['host'] = 'p:localhost';
 
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Hmm, connections to localhost should not use TCP but rather a unix socket.

Or do you have specifically disabled socket usage?
 
You are correct about the bad example, I just copy-pasted it from the manual and added p:. I think the general suggestion is still valid though (with an adjusted example).
 
Actually I wouldn't generally recommend persistent connections, though they do make sense in some cases - for example if XF is more or less the only application using the database server.
 
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