Core Issue
Cisco CallManager Server becomes periodically unresponsive and shows the page memory pool errors.
This is due to the known issue documented in Article 888928 in the Microsoft Knowledge Base. Refer to 888928-Your Windows Server 2003-based or Windows 2000-based computer occasionally becomes unresponsive, and you receive an Event ID 2019 error message in the System log.
After you install McAfee VirusScan Enterprise Version 8.0i, your Microsoft Windows Server 2003-based or Microsoft Windows 2000-based computer may occasionally stop responding. You may receive error messages that are similar to this in the System log: The server was unable to allocate from the system nonpaged pool because the pool was empty.
This happens because a leak occurs in the system non-paged memory pool. The pool tags that indicate the location of the memory leak are McOp and McFN.
Resolution
To resolve this problem, contact Network Associates to obtain the Patch 7 for McAfee VirusScan Enterprise 8.0i.
This memory leak can be monitored by using the Memory Pool Monitor utility, Poolmon.exe, and the GFlags tool. These utilities are available in the \Support\Tools folder of the Windows Server 2003 CD. For additional information about how to use the Memory Pool Monitor, refer to this article in the Microsoft Knowledge Base: How to use Memory Pool Monitor (Poolmon.exe) to troubleshoot kernel mode memory leaks.
