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

This article has been archived. It is offered "as is" and will no longer be updated.
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.
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 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.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


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.
Microsoft has confirmed that this is a bug in the Microsoft products that are listed in the "Applies to" section.
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
win2k win2000

Article ID: 822226 - Last Review: 12/08/2015 02:59:48 - Revision: 3.6

Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Advanced Server

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