Microsoft KB Archive/936655

= A Citrix process uses 4 gigabytes (GB) of nonpaged pool memory on a Microsoft Windows Server 2003-based computer =

Article ID: 936655

Article Last Modified on 10/11/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, Enterprise x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems

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SYMPTOMS
On a Microsoft Windows Server 2003-based computer, when you view Windows Task Manager, you see that a Citrix process uses 4 gigabytes (GB) of nonpaged pool memory. This problem occurs when the computer is running Citrix Presentation Server.



CAUSE
This problem occurs because the Afd.sys file may charge the quota to one Citrix process after the Citrix process allocates the nonpaged pool memory. Then, the quota is returned to another Citrix process after the Citrix process frees the nonpaged pool memory. When the nonpaged pool memory is allocated and then freed repeatedly, the quota that is allocated for the second time is a negative number. On a 32-bit system, this negative number is interpreted as a second Citrix process that uses 4 GB of nonpaged pool memory.



Hotfix Information
A supported hotfix is now 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 service pack that contains this hotfix.

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
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) or Windows Server 2003 Service Pack 2 (SP2) installed on the computer.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

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 item in Control Panel.

Windows Server 2003 with SP2, Itanium-based versions


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



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Additional query words: 4G nonpaged pool

Keywords: kbqfe kbexpertiseinter kbhotfixserver KB936655

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