Event ID : 9582

Issue : VM Fragmentation issue.

Event Source: MSExchangeIS

Cause : Virtual memory fragmentation is a condition where virtual memory is available for a process, but none of the virtual memory blocks that are available are of a significant size. Memory fragmentation occurs over time because of the varying size of memory allocations and the varying lifetimes of each allocation. When you scale a server to handle more users and larger loads, the server may run low on virtual memory in the Microsoft Exchange Information Store process (Store.exe). When this issue occurs, event ID 9582 events are logged to the application event log.

Description : "VM Fragmentation issue" .The Virtual memory necessary to run your Exchange server is fragmented in such a way that normal operation may begin to fail.The server reaches less than 16 MBs of contiguous virtual address space.When this error occurs, the performance of the Exchange Server decreases.

Action Required : Run Microsoft Exchange Best Practices Analyzer (ExBPA) tool to check this issue. It is highly recommended that you restart all Exchange services to correct this issue.

Ref.Link : http://support.microsoft.com/kb/324331