Microsoft KB Archive/921473

= WMI event buffering may delay the delivery of events to the WMI consumer in Windows Server 2003 =

Article ID: 921473

Article Last Modified on 10/11/2007

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APPLIES TO

 Microsoft Windows Management Instrumentation 1.5, when used with:  Microsoft Windows Server 2003, Standard Edition (32-bit x86)

 Microsoft Windows Server 2003, Enterprise Edition

 Microsoft Windows Server 2003, Web Edition

 Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)</li></ul>

 Microsoft Windows Server 2003, Enterprise x64 Edition</li></ul>

 Microsoft Windows Server 2003, Standard x64 Edition</li></ul>

 Microsoft Windows Server 2003, Datacenter x64 Edition</li></ul>

 Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems</li></ul>

 Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems</li></ul> </li></ul>

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SYMPTOMS
Microsoft Windows Management Instrumentation (WMI) event buffering may delay the delivery of events to the WMI consumer. In certain scenarios, WMI may take days to deliver the event to the consumer.

If you turn on WMI verbose error logging, you may see entries that indicate this delay:

(<Date><Time>): Penalty for 17301548 out of 61652281 of events held for consumers (5065 members) is 165 ms

(<Date><Time>): Penalty for 21621364 out of 60430648 of events held for consumers (5065 members) is 43 ms

(<Date><Time>): Penalty for 17781118 out of 62175272 of events held for consumers (5065 members) is 217 ms

(<Date><Time>): Penalty for 22057520 out of 60878170 of events held for consumers (5065 members) is 293000220 ms

In this example, the delivery of events has slowed down to 293000220 milliseconds (ms) from 217 ms.

<div class="cause_section">

CAUSE
This problem may occur if the WMI event subsystem is being heavily used.

To accommodate speed differentials between event providers and event consumers, WMI may try to throttle (slow down) an event provider. For more efficiency, consumers must collect the objects at a pace that matches the provider. If the queue grows out of control, WMI gradually throttles the delivery of events to align with the consumer's rate. This slowdown starts when the rate at which events are generated exceeds the value of the LowThresholdOnEvents property.

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Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) or an x64-based version of Windows Server 2003 installed.

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, Itanium-based versions
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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Windows Server 2003 Service Pack 2.

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MORE INFORMATION
For more information about the terms that are used to describe software updates, 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

Keywords: kbbug kbfix kbqfe kbpubtypekc kbwinxppresp3fix kbhotfixserver kbwinserv2003sp2fix KB921473

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