Article ID: 897707 - View products that this article applies to.
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.
This issue occurs because the Information Store process leaks thread handles and event handles if more than 20 databases are mounted.
Service pack informationTo 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:
(http://support.microsoft.com/kb/836993/EN-US/ )How to obtain the latest service packs for Exchange Server 2003
Hotfix informationA supported hotfix is 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 software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
PrerequisitesBecause 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:
(http://support.microsoft.com/kb/836993/ )How to obtain the latest service packs for Exchange Server 2003
Restart requirementYou 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 informationThe 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
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem was first corrected in Exchange Server 2003 Service Pack 2.