This article discusses the "Unable to allocate memory for pool" error message in PHP.
When you try to view a page running PHP, you receive the following error message:
Unable to allocate memory for pool
To resolve this problem, our Guru Crew must adjust APC (Alternative PHP Cache) configuration settings for your account. Please open a support ticket on the A2 Hosting Customer Portal at https://my.a2hosting.com. In the ticket, please provide the complete text of the error message you receive, as well as a reference to this Knowledge Base article.
For more information about APC, please visit http://www.php.net/apc.