Microsoft KB Archive/810985

= XADM: Virtual Memory Fragmentation Occurs When You Fail Over an Exchange 2000 Virtual Server =

Article ID: 810985

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Exchange 2000 Enterprise Server

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SYMPTOMS
When you fail over an Exchange 2000 virtual server to another node on an Active/Passive cluster, and then fail back to the original node, you experience more virtual memory fragmentation on the original cluster node than you might expect.



CAUSE
This behavior occurs because the Exchange 2000-related services are not stopped when you fail over an Exchange 2000 virtual server to another cluster node. When an Exchange virtual server is failed over from one cluster node to another, the Exchange 2000-related services are started on the second cluster node if they are not already running. However, the Exchange 2000-related services are not automatically stopped on the node from which the Exchange 2000 virtual server failed over. Because of this, when the Exchange 2000 virtual server is failed back to the original node, virtual memory fragmentation of the information store (Store.exe) process may occur more rapidly than you might expect.



WORKAROUND
To work around this problem, before you move an Exchange 2000 virtual server back to a passive cluster node that already has the Exchange 2000 services running, restart the Exchange 2000-related services or that cluster node.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

296073 XADM: Monitoring for Exchange 2000 Memory Fragmentation

Additional query words: kbClustering, cluster, services, mscs, virtual memory, fragmentation

Keywords: kbprb kbpending kbbug KB810985

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