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

• Microsoft Exchange Server, version 5.5

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: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

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:

Q159196 XADM: Tasks Controlled by the IS Maintenance Schedule

Q159306 XADM: IS Maintenance Tasks Not on IS Schedule

Additional query words:

Keywords : exc55
Version : winnt:5.5
Platform : winnt
Issue type : kbprb