Hi,

This seems like a simple problem. It's most likely one of your configuration directives.

Check out some of the "research" I did here, on MySQL configuration directives.

These particular articles might help:

http://www.sitebuddy.com/MySQL/thread_cache_size/thread_concurrency

http://www.sitebuddy.com/MySQL/max_allowed_packet/max_connections/Wait_timeout

2 main ideas:

1) Remove persistent MySQL connections from your php.ini (even if this works I recommend you see point 2), to determine exactly which resource is limited. It important to have a stable system to know its "weak points").

http://www.sitebuddy.com/PHP/mysql/Persistent/Database/Connections

2) You have limited resources.

Two principals here:

2.1) Try to increase the available resources (threads, connections ...etc...)

2.2) Try to decrease the amount of time a resource is allocated (time out type values should be decreased).

Let us know when you find the exact param that fixed your issue.

Good luck.

Chris