XADM: Information Store Uses Large Amount of Processor Time when Background Cleanup Is Set to Zero (243581)


The information in this article applies to:

  • Microsoft Exchange Server 5.5
This article was previously published under Q243581

SYMPTOMS

When information store maintenance runs on an Exchange Server computer, the information store (the Store.exe process) uses large amounts of processor time (90 to 100 percent). You must restart the server or stop the information store process to stop the Store.exe process from using up the processor time.

If you use Windows NT Performance Monitor to monitor the information store threads, you notice that two information store threads use between 35 to 65 percent of the processor time when the problem occurs.

CAUSE

The following registry values are set to zero:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS \ParametersPublic\Background Cleanup (value in milliseconds)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ ParametersPrivate\Background Cleanup (value in milliseconds)

RESOLUTION

Set the registry entries in the "Cause" section of this article to the default of 60000 in decimal (EA60 in hexidecimal). To do this, you need to edit the registry.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

  1. Start the Registry Editor (Regedt32.exe).
  2. Locate the Background Cleanup value under the following key in the registry:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\ ParametersPrivate

  3. On the Edit menu, click REG_DWORD, change the value to 60000 in decimal or EA60 in hexidecimal, and then click OK.
  4. Locate the Background Cleanup value under the following key in the registry:

    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\ ParametersPublic

  5. On the Edit menu, click REG_DWORD, change the value to 60000 decimal or EA60 hexidecimal, and then click OK.
  6. Quit the Registry Editor.
  7. Restart the information store service and any dependent services.

MORE INFORMATION

For additional information about information store maintenance tasks, click the article numbers below to view the articles in the Microsoft Knowledge Base:

159196 XADM: Tasks Controlled by the IS Maintenance Schedule

159306 XADM: IS Maintenance Tasks Not on IS Schedule

Modification Type:MinorLast Reviewed:4/21/2005
Keywords:kbprb KB243581
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