CiviCRM Community Forums (archive)

I am having an issue when I turn on page caching in Joomla(this is a must, because of the number of hits when the event registration actually begins).  I am getting invalid key upon submit from the first registration page.  In other words, I can register once, then no one else can register.

On IRC, dlobo helped me solve the performance issues without experiencing the issues arising from caching.  Basically, civicrm has memcache support, one must just apply it in the config files.  Then, I set up memcache for Joomla all around, system settings (global config), a plugin for sql caching, and changed Joomla's system cache to use memcache by changing the cache.php to memcache.php.  All this, coupled with configuring mpm-itk for apache2 to only allow a maximum number of connections (based on available ram on my server, which will change on the heavy registration days) solved all performance issues.  Now the server has the ability to quickly serve the client load, no matter how many try to register at one time, without moving to swap space (which killed performance or rather crashed the server).  Long and short is, proper configuration made the difference.   

Thank you, Lobo, for all your assistance. 

Might want to check:

http://forum.civicrm.org/index.php/topic,12361.msg53269.html#msg53269

to get started. Might be good to start a wiki page on how to improve performance and some things folks can/should do

lobo