Article ID: 322124 - View products that this article applies to.
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The information store can cause undue memory pressure to a system that has a large number of users. This causes performance issues for Messaging Application Program Interface (MAPI) and non-MAPI users. In extreme cases, the information store may not respond to remote procedure call (RPC) requests.
When a message has attachments, a subobject is created on the message object for each attachment. The system allocates memory for each attachment subobject. When you have messages that have many attachments, the information store may erroneously keep memory allocated for these subobjects even when the objects are no longer needed and can be destroyed. System memory is not freed up if these subobjects are not destroyed.
To resolve this problem, obtain the latest service pack for Microsoft Exchange 2000 Server. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
301378The English version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/301378/EN-US/ )XGEN: How to Obtain the Latest Exchange 2000 Server Service Pack
Component: Information Store
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Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server. This problem was first corrected in Microsoft Exchange 2000 Server Service Pack 3.