Memory leak in Wmiapsrv.exe on a computer that is running Windows Server 2008, Windows Server 2008 R2, Windows Vista or Windows 7

Symptoms

Assume that you use a performance monitoring tool that uses Performance Data Helper (PDH) functions to query performance data on a computer that is running one of the following operating systems:

  • Windows Vista

  • Windows Server 2008

  • Windows 7

  • Windows Server 2008 R2

For example, you use the System Monitor tool. In this situation, the memory usage of the Windows Management Instrumentation (WMI) Performance Adapter service (Wmiapsrv.exe) increases continuously. Therefore, the performance of the computer decreases.

Note This issue typically occurs when you use the performance monitoring tool to query performance counters that are related to iSCSI targets.

Cause

This issue occurs because an object is not cleaned up after the client application queries the performance data. Therefore, a memory leak occurs.

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 website:

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 Vista Service Pack 2 (SP2)

  • Windows Server 2008 Service Pack 2 (SP2)

  • 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 Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

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

968849 How to obtain the latest service pack for Windows Server 2008

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 apply this hotfix, 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 Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" 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

    6.0.600
    0.
    20xxx

    Windows Vista

    RTM

    LDR

    6.0.600
    1.
    22xxx

    Windows Vista and Windows Server 2008

    SP1

    LDR

    6.0.600
    2.
    22xxx

    Windows Vista and Windows Server 2008

    SP2

    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 and for Windows Vista" section. MUM files 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 Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Wmiprov.dll

6.0.6002.22971

152,576

10-Nov-2012

02:40

x86

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

File name

File version

File size

Date

Time

Platform

Wmiprov.dll

6.0.6002.22971

228,352

10-Nov-2012

03:57

x64

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

File name

File version

File size

Date

Time

Platform

Wmiprov.dll

6.0.6002.22971

481,792

10-Nov-2012

02:14

IA-64

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, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.1.760
    0.21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • 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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. 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

Wmiprov.dll

6.1.7600.21182

154,112

06-Apr-2012

06:57

x86

Wmiprov.dll

6.1.7601.21959

154,112

06-Apr-2012

07:42

x86

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

File name

File version

File size

Date

Time

Platform

Wmiprov.dll

6.1.7600.21182

228,864

06-Apr-2012

07:46

x64

Wmiprov.dll

6.1.7601.21959

228,864

06-Apr-2012

07:39

x64

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

File name

File version

File size

Date

Time

Platform

Wmiprov.dll

6.1.7600.21182

489,472

06-Apr-2012

06:28

IA-64

Wmiprov.dll

6.1.7601.21959

489,472

06-Apr-2012

06:30

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 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

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008

File name

Update.mum

File version

Not Applicable

File size

2,412

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

File name

X86_74ecea31af2c8a77f115d810e8b64e05_31bf3856ad364e35_6.0.6002.22971_none_d6c04eb265b20931.manifest

File version

Not Applicable

File size

704

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

File name

X86_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.0.6002.22971_none_7c584070788b6409.manifest

File version

Not Applicable

File size

9,404

Date (UTC)

10-Nov-2012

Time (UTC)

02:50

Platform

Not Applicable

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

File name

Amd64_c673e8955ab6ce28d268da966038bf35_31bf3856ad364e35_6.0.6002.22971_none_fd76189a78e2037b.manifest

File version

Not Applicable

File size

708

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

File name

Amd64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.0.6002.22971_none_d876dbf430e8d53f.manifest

File version

Not Applicable

File size

9,688

Date (UTC)

10-Nov-2012

Time (UTC)

04:11

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

2,430

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

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

File name

Ia64_8a944a4a7883c436e08c38aaa5cc3d0b_31bf3856ad364e35_6.0.6002.22971_none_38e3b86a40fdf3bc.manifest

File version

Not Applicable

File size

706

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

File name

Ia64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.0.6002.22971_none_7c59e46678896d05.manifest

File version

Not Applicable

File size

9,674

Date (UTC)

10-Nov-2012

Time (UTC)

02:22

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

2,255

Date (UTC)

10-Nov-2012

Time (UTC)

04:39

Platform

Not Applicable

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

X86_15be2a6b695ae9866d0ad8c2e1f445a3_31bf3856ad364e35_6.1.7601.21959_none_d4084049a92028d0.manifest

File version

Not applicable

File size

704

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

X86_630adffe125b531e1f6e79c02cafd00b_31bf3856ad364e35_6.1.7600.21182_none_794b813036592bc7.manifest

File version

Not applicable

File size

704

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

X86_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7600.21182_none_7a8fa19bdc83bce2.manifest

File version

Not applicable

File size

5,733

Date (UTC)

06-Apr-2012

Time (UTC)

07:49

Platform

Not applicable

File name

X86_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7601.21959_none_7c9d9a2fd98b5041.manifest

File version

Not applicable

File size

5,733

Date (UTC)

06-Apr-2012

Time (UTC)

08:30

Platform

Not applicable

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

File name

Amd64_0b61cd8de3ce91414d9428eb1aa41e23_31bf3856ad364e35_6.1.7600.21182_none_1dc5ff42e19022ea.manifest

File version

Not applicable

File size

708

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

Amd64_38dbcdffcf15c27baa09282a13121329_31bf3856ad364e35_6.1.7601.21959_none_9d7498e829842835.manifest

File version

Not applicable

File size

708

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

Amd64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7600.21182_none_d6ae3d1f94e12e18.manifest

File version

Not applicable

File size

5,737

Date (UTC)

06-Apr-2012

Time (UTC)

08:35

Platform

Not applicable

File name

Amd64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7601.21959_none_d8bc35b391e8c177.manifest

File version

Not applicable

File size

5,737

Date (UTC)

06-Apr-2012

Time (UTC)

08:56

Platform

Not applicable

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

File name

Ia64_040f38dc81fa0c21a5dfd9d7cd89664e_31bf3856ad364e35_6.1.7600.21182_none_e28c3ed47ca3c34a.manifest

File version

Not applicable

File size

706

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

Ia64_2fc7f43de0bbf66b2fe86629e6bf77db_31bf3856ad364e35_6.1.7601.21959_none_842db302c8df7cd9.manifest

File version

Not applicable

File size

706

Date (UTC)

06-Apr-2012

Time (UTC)

16:24

Platform

Not applicable

File name

Ia64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7600.21182_none_7a914591dc81c5de.manifest

File version

Not applicable

File size

5,735

Date (UTC)

06-Apr-2012

Time (UTC)

10:08

Platform

Not applicable

File name

Ia64_microsoft-windows-wmi-wdm-provider_31bf3856ad364e35_6.1.7601.21959_none_7c9f3e25d989593d.manifest

File version

Not applicable

File size

5,735

Date (UTC)

06-Apr-2012

Time (UTC)

10:34

Platform

Not applicable

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