Source: MSExchangeIS
Category: Performance
ID: 9582
Type: Warning
Description:
The virtual memory necessary to run your Exchange server is fragmented in such a way that performance may be affected. It is highly recommended that you restart all Exchange services to correct this issue.

Source: MSExchangeIS
Category: Performance
ID: 9582
Type: Error
Description:
The virtual memory necessary to run your Exchange server is fragmented in such a way that performance may be affected. It is highly recommended that you restart all Exchange services to correct this issue.

İlgili KB: http://support.microsoft.com/kb/325044/en-us