Changes to performance counters are not updated for at least 15 minutes when you use WMI to query performance counter values in Windows 7 or in Windows Server 2008 R2

Symptoms

Assume that you add or update some performance counters on a computer that is running Windows 7 or Windows Server 2008 R2. In this situation, changes to the performance counters are not updated for at least 15 minutes when you use Windows Management Instrumentation (WMI) to query performance counter values. When this issue occurs, you cannot query the expected updated values from the performance counters.

Cause

This issue occurs because the performance counter WMI provider keeps a cache which is refreshed every 15 minutes. If a query is issued within 15 minutes after some performance counters are updated, the refresh timer starts to count from 0 again. Therefore, changes to the performance counters may never be updated if a query is issued every "T" minutes and "T" is less than 15.

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.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:

  • Windows 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information notes


Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.1.760
    0.
    16xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    GDR

    6.1.760
    0.
    21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.
    17xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    GDR

    6.1.760
    1.
    21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.21055

90,112

16-Sep-2011

06:46

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21820

90,112

16-Sep-2011

06:17

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.21055

136,192

16-Sep-2011

05:19

x64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:49

Not applicable

Wmiperfinst.dll

6.1.7600.16385

64,512

14-Jul-2009

01:41

x64

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:49

Not applicable

Wmiperfclass.dll

6.1.7601.21820

136,192

16-Sep-2011

06:39

x64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:49

Not applicable

Wmiperfinst.dll

6.1.7600.16385

64,512

14-Jul-2009

01:41

x64

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:49

Not applicable

Wmiperfclass.dll

6.1.7600.21055

90,112

16-Sep-2011

06:46

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21820

90,112

16-Sep-2011

06:17

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

For all supported IA-64–based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Wmiperfclass.dll

6.1.7600.21055

308,736

16-Sep-2011

04:14

IA-64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:54

Not applicable

Wmiperfinst.dll

6.1.7600.16385

165,376

14-Jul-2009

01:50

IA-64

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:54

Not applicable

Wmiperfclass.dll

6.1.7601.21820

308,736

16-Sep-2011

04:20

IA-64

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

20:54

Not applicable

Wmiperfinst.dll

6.1.7600.16385

165,376

14-Jul-2009

01:50

IA-64

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

20:54

Not applicable

Wmiperfclass.dll

6.1.7600.21055

90,112

16-Sep-2011

06:46

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Wmiperfclass.dll

6.1.7601.21820

90,112

16-Sep-2011

06:17

x86

Wmiperfclass.mof

Not applicable

980

10-Jun-2009

21:31

Not applicable

Wmiperfinst.dll

6.1.7600.16385

50,176

14-Jul-2009

01:16

x86

Wmiperfinst.mof

Not applicable

804

10-Jun-2009

21:31

Not applicable

Workaround

To work around this issue, restart the computer.

Status

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

More Information

As a simple example, use Wbemtest.exe to run the following query:
select * from Meta_Class where __Class like 'win32_Perf%spooler%'

After you run the query, change the state of the spooler by using the following command at the command prompt:
net stop spooler

Then, immediately re-execute the previous query in Wbemtest.exe. The query results do not change before you apply this hotfix.

For 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

For more information about a similar issue, click the following article number to view the article in the Microsoft Knowledge Base:

2581359 The PdhEnumObjects function used together with the bRefresh parameter does not function correctly in Windows 7 or in Windows Server 2008 R2

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not applicable

File size

2,316

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_49f874ba35f4c12c50406340fdcb78ca_31bf3856ad364e35_6.1.7600.21055_none_9da4289c740e0228.manifest

File version

Not applicable

File size

695

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_b095971e58b56b78049e252c58034701_31bf3856ad364e35_6.1.7601.21820_none_746436e423b5fbdc.manifest

File version

Not applicable

File size

695

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.21055_none_a01a587b2cb0dc3d.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:41

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21820_none_a21c4d9729c33f88.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:41

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_49f874ba35f4c12c50406340fdcb78ca_31bf3856ad364e35_6.1.7600.21055_none_f9c2c4202c6b735e.manifest

File version

Not applicable

File size

697

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_7cda5398cc4092354af0987c29190a88_31bf3856ad364e35_6.1.7600.21055_none_a959b4512aa1fdff.manifest

File version

Not applicable

File size

699

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_994372734595647e1dffb56acc48866c_31bf3856ad364e35_6.1.7601.21820_none_6c11c9a7bcea623a.manifest

File version

Not applicable

File size

1,038

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_b095971e58b56b78049e252c58034701_31bf3856ad364e35_6.1.7601.21820_none_d082d267dc136d12.manifest

File version

Not applicable

File size

697

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_f4ad56bf52a65f9955b1f250817b9650_31bf3856ad364e35_6.1.7601.21820_none_a68f8e5cdd6896c0.manifest

File version

Not applicable

File size

699

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_f6991c3681ded7b6885a2a9277e64865_31bf3856ad364e35_6.1.7600.21055_none_b2911c7a50ddda36.manifest

File version

Not applicable

File size

1,038

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Amd64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.21055_none_fc38f3fee50e4d73.manifest

File version

Not applicable

File size

7,525

Date (UTC)

16-Sep-2011

Time (UTC)

17:46

Platform

Not applicable

File name

Amd64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21820_none_fe3ae91ae220b0be.manifest

File version

Not applicable

File size

7,525

Date (UTC)

16-Sep-2011

Time (UTC)

17:46

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,599

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.21055_none_a01a587b2cb0dc3d.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:46

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21820_none_a21c4d9729c33f88.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:46

Platform

Not applicable

Additional files for all supported IA-64–based versions of Windows Server 2008 R2

File name

Ia64_336f8e1bac8344cd941258b628e6697d_31bf3856ad364e35_6.1.7600.21055_none_416a7d34355f9142.manifest

File version

Not applicable

File size

697

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Ia64_37505fcd961ae182d79ac6a61c002095_31bf3856ad364e35_6.1.7601.21820_none_aee14b18de1016f0.manifest

File version

Not applicable

File size

697

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Ia64_49f874ba35f4c12c50406340fdcb78ca_31bf3856ad364e35_6.1.7600.21055_none_9da5cc92740c0b24.manifest

File version

Not applicable

File size

696

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Ia64_b095971e58b56b78049e252c58034701_31bf3856ad364e35_6.1.7601.21820_none_7465dada23b404d8.manifest

File version

Not applicable

File size

696

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Ia64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.21055_none_a01bfc712caee539.manifest

File version

Not applicable

File size

7,523

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Ia64_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21820_none_a21df18d29c14884.manifest

File version

Not applicable

File size

7,523

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,169

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7600.21055_none_a01a587b2cb0dc3d.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

File name

X86_microsoft-windows-wmiperf_31bf3856ad364e35_6.1.7601.21820_none_a21c4d9729c33f88.manifest

File version

Not applicable

File size

7,521

Date (UTC)

16-Sep-2011

Time (UTC)

17:35

Platform

Not applicable

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