Microsoft KB Archive/822226

= Output Queue Length Performance Counter Value Is Not Reliable on Computers with Symmetric Multiprocessing (SMP) Architecture =

Article ID: 822226

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
You can use the Output Queue Length performance counter in the Network Interface object type for network adapter monitoring or Simple Network Management Protocol (SNMP) querying. Typically, the Output Queue Length value is not higher than 0 (zero). If it does reach a value higher than zero, it typically returns to zero quickly. Values that are higher than 2 may indicate that there are delays.

The Network Driver Interface Specification (NDIS) implementation queues the SNMP query requests. As a result, the Output Queue Length value is typically always at 0. However, in a symmetric multiprocessing (SMP) computer, the value may be much higher than 2 in Performance Monitor, in System Monitor, or in a returned SNMP query.



CAUSE
TCP/IP maintains the Output Queue Length counter. NDIS does not. TCP/IP in Windows NT and in Windows 2000 does not use interlocked operations to help guarantee the integrity of its statistics counters.



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

To resolve this problem, 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
No prerequisites are required.

Restart Requirement
You must restart your 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.   Date         Time   Version        Size     File name 17-Mar-2003 23:11  5.0.2195.6687  119,024  Afd.sys 14-Jul-2003 21:52  5.0.2195.6602  108,816  Msafd.dll 14-Jul-2003 21:39  5.0.2195.6780  314,928  Tcpip.sys 15-Jan-2003 16:56  5.0.2195.6655   16,240  Tdi.sys 14-Jul-2003 21:52  5.0.2195.6601   17,680  Wshtcpip.dll Note If the problem persists after you install the hotfix, reinstall or update the network adapter drivers.



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



MORE INFORMATION
For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New Naming Schema for Microsoft Windows Hotfix Packages

Additional query words: win2k win2000

Keywords: kbhotfixserver kbbug kbfix kbqfe kbwin2000presp5fix KB822226

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