Microsoft KB Archive/835152

= CPU usage hits 100 percent if the system is low on memory and the Server for NFS service is running =

Article ID: 835152

Article Last Modified on 11/15/2007

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APPLIES TO


 * Microsoft Windows Storage Server 2003

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SYMPTOMS
When available memory is almost exhausted, the CPU utilization reaches 100 percent and stays at 100 percent until the available memory increases. This behavior only occurs when the Server for NFS service is running. The behavior may occur regardless of whether the system has exported any network file system (NFS) shares.



CAUSE
Server for NFS tries to free memory in its internal caches when it encounters a low memory situation. This action can help make the low memory condition less severe and can help improve system performance and stability. However, the NFS driver searches constantly for memory to free until the system is no longer in a low memory situation, and in the process it completely uses the CPU.



RESOLUTION
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that this article describes. Apply this hotfix only to systems that are experiencing this specific problem.

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
No prerequisites are required.

Restart requirement
You do not have to restart your computer after you apply this hotfix.

The English version of this hotfix has the file attributes (or later) 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 ---  20-Jan-2004  23:52  7.1.2239.4  423,168  Nfssvr.sys



WORKAROUND
If you are not using Server for NFS, you can stop the Server for NFS service until the hotfix is applied. To do this, follow these steps:
 * 1) Click Start, and then click Run.
 * 2) In the Open box, type command, and then click OK.
 * 3) At the command prompt, type net stop nfssvc, and then press ENTER.



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

Keywords: kbqfe kbhotfixserver kbfix kbbug KB835152

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