FIX: The IIS 7.0 performance counters stop updating after a Windows Vista system or a Windows Server 2008 system runs continuously for 30 to 45 days

Symptoms

After a Windows Vista system or a Windows Server 2008 system runs continuously for 30 to 45 days, the Microsoft Internet Information Services (IIS) 7.0 performance counters stop updating. Therefore, you cannot collect IIS 7.0 performance data by using Reliability and Performance Monitor. Additionally, an application event that resembles the following is logged in Event Viewer:

Cause

This issue occurs because of an optimization logic that was introduced in IIS 7.0. This logic ignores the queued performance counter requests when the time stamps of the queued performance counter requests are smaller than the time stamps of the performance counter data in shared memory.

IIS 7.0 uses the GetTickCount Win32 API to obtain the time stamp values for both the queued performance counter requests and the performance counter data in the shared memory. These time stamp values are stored as DWORD values and are reset to zero if the system runs continuously for 49.7 days.

After the time stamp value of a request is reset to zero, the time stamp value of a request is always smaller than the time stamps in shared memory. Therefore, the request is ignored and the IIS performance counters stop updating.

Resolution

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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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:

http://support.microsoft.com/contactus/?ws=supportNote 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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

You must have Windows Vista or Windows Server 2008 installed to apply this hotfix.

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 global 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 2008 and of Windows Vista, x86-based versions

File name

File version

File size

Date

Time

Platform

Iisw3adm.dll

7.0.6001.22258

371,712

05-Sep-2008

05:08

x86

W3tp.dll

7.0.6001.22258

15,872

05-Sep-2008

05:08

x86

W3wphost.dll

7.0.6001.22258

46,592

05-Sep-2008

05:08

x86

Wbhstipm.dll

7.0.6001.22258

24,064

05-Sep-2008

05:08

x86

Wbhst_pm.dll

7.0.6001.22258

22,528

05-Sep-2008

05:08

x86

Windows Server 2008 and of Windows Vista, x64-based versions

File name

File version

File size

Date

Time

Platform

Iisw3adm.dll

7.0.6001.22258

425,472

05-Sep-2008

05:32

x64

W3tp.dll

7.0.6001.22258

18,432

05-Sep-2008

05:32

x64

W3wphost.dll

7.0.6001.22258

50,176

05-Sep-2008

05:32

x64

Wbhstipm.dll

7.0.6001.22258

28,672

05-Sep-2008

05:32

x64

Wbhst_pm.dll

7.0.6001.22258

24,064

05-Sep-2008

05:32

x64

Windows Server 2008 and of Windows Vista, Itanium architecture versions

File name

File version

File size

Date

Time

Platform

Iisw3adm.dll

7.0.6001.22258

892,416

05-Sep-2008

06:20

IA-64

W3tp.dll

7.0.6001.22258

37,376

05-Sep-2008

06:29

IA-64

W3wphost.dll

7.0.6001.22258

117,760

05-Sep-2008

06:29

IA-64

Wbhstipm.dll

7.0.6001.22258

62,464

05-Sep-2008

06:29

IA-64

Wbhst_pm.dll

7.0.6001.22258

59,392

05-Sep-2008

06:29

IA-64

Status

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

More Information

For more information about IIS 7.0 performance counters, visit the following Microsoft Web site:

http://technet.microsoft.com/en-us/library/cc735258.aspxFor more information about the GetTickCount function, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn.microsoft.com/en-us/library/ms724408.aspxFor more information about software update terminology, 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

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