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View Full Version : MySQL server keeps going away


Mitch100degrees
Wed 9th Jul '08, 9:09pm
Hello,

I recently moved to a new server from MySQL 4.1 to MySQL 5 and I keep getting database errors from my forum.

Invalid SQL:

UPDATE vb_session
SET lastactivity = 1215643669, location = '/forum/index.php',
inforum = 0, inthread = 0, incalendar = 0, badlocation = 0
WHERE sessionhash = '7d9097fd7b1d3fb16b94c2f79ba25e6f';

MySQL Error : MySQL server has gone away
Error Number : 2006Now its only doing this on session update queries, and I should note the server is running very fast. The forum is fairly active and I only get about 50-75 of these a day or so.

It operates on a shared hosting server, so I have to keep the MySQL config in check. I have thread_cache_size set to 256 and wait_timeout set to 180. I notice that the connections from my vBulletin forum drop as soon as they are done, however connections from other scripts my clients are using tend to hang around till wait_timeout kills them. I have max_connections set to 500 so I worry that if I set wait_timeout higher, that value will be reached. Also the usepconnect variable in the config file is set to 0.

Can someone recommend what I should do?

Steve Machol
Thu 10th Jul '08, 12:31am
Try increasing the wait_timeout until you no longer get this error.