You may experience a memory leak in the non-paged pool memory when you mount more than 20 databases in Exchange Server 2003 (897707)


The information in this article applies to:

  • Microsoft Exchange Server 2003 Standard Edition
  • Microsoft Exchange Server 2003 Enterprise Edition

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.

RESOLUTION

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, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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 "Applies to" section.

This problem was first corrected in Exchange Server 2003 Service Pack 2.
Modification Type:MinorLast Reviewed:7/25/2006
Keywords:kbQFE KBHotfixServer kbexchSTORE kbfix kbBug kbpubtypekc KB897707 kbAudITPRO
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