Microsoft KB Archive/897707

= You may experience a memory leak in the non-paged pool memory when you mount more than 20 databases in Exchange Server 2003 =

Article ID: 897707

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
If you mount more than 20 databases in Exchange Server 2003, you may experience a memory leak in the non-paged pool memory. When the server that is running Exchange Server 2003 runs out of non-paged pool memory, the Microsoft Exchange Information Store service may stop responding. If an Exchange Server 2003 server in a cluster environment runs out of non-paged pool memory, a failover may occur.



CAUSE
This issue occurs because the Information Store process leaks thread handles and event handles if more than 20 databases are mounted.



Service pack information
To resolve this problem, obtain the latest service pack for Exchange Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
Because of file dependencies, this hotfix requires Microsoft Exchange Server 2003 Service Pack 1.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement
You do not have to restart the computer after you apply this hotfix. However, if a memory leak has occurred, the memory that was leaked cannot be recovered until you restart the server.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.    Date         Time   Version            Size    File name --  21-Jun-2005  03:00  6.5.7233.28     3,261,952  Mdbmsg.dll 04-Jun-2005 01:56                      3,304  Redir.asp 21-Jun-2005 03:33  6.5.7233.28     5,176,832  Store.exe



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

This problem was first corrected in Exchange Server 2003 Service Pack 2.

Additional query words: XADM

Keywords: kbqfe kbhotfixserver kbexchstore kbfix kbbug kbpubtypekc KB897707

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