The memory usage of the DFS Replication service keeps increasing on a PDC emulator or on a writable domain controller that is running Windows Server 2008 during the SYSVOL share replication process

Applies to: Windows Server 2008 DatacenterWindows Server 2008 EnterpriseWindows Server 2008 Standard


Consider the following scenario:
  • On a computer that is running Windows Server 2008, you install the Distributed File System (DFS) Replication service.
  • You configure this computer to be a primary domain controller (PDC) emulator or a writable domain controller.
  • The DFS Replication is used to perform Domain System Volume (SYSVOL share) replication.
In this scenario, the memory usage of the DFS Replication service keeps increasing. If you monitor the DFS Replication service by using Performance Monitor utility (Perfmon.exe), you find that the Private Bytes counter keeps increasing.

Note This issue usually occurs on the Windows Server 2008-based PDC emulators or on the writable domain controllers in a domain that has many read-only domain controllers.


This problem occurs because the DFS Replication service does not free up some allocated memory during the SYSVOL share replication process.


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: 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.

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.


To apply this hotfix, your computer must be running one of the following operating systems:
  • Windows Server 2008
  • Windows Server 2008 Service Pack 2 (SP2)
Additionally, the DFS Replication service must be installed on the computer.

Restart requirement

You must restart the computer after you apply this hotfix.

Registry information

You do not have to make any change to the registry.

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 Vista file information note
The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are
listed separately. 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 (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatformSP requirement
Dfsrprovs.mofNot Applicable66,51116-Jul-200911:41Not ApplicableSP1
Dfsrprovs.mofNot Applicable66,51116-Jul-200911:41Not ApplicableSP2
For all supported x64-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatformSP requirement
Dfsrprovs.mofNot Applicable66,51116-Jul-200911:43Not ApplicableSP1
Dfsrprovs.mofNot Applicable66,51116-Jul-200911:42Not ApplicableSP2


To work around the issue, use only domain controllers that are running Windows Server 2008 R2 in the whole domain.


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, 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 for Windows Server 2008

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

File nameFile versionFile sizeDateTimePlatform
Package_for_kb971203_sc_0~31bf3856ad364e35~x86~~ Applicable37,71817-Jul-200910:17Not Applicable
Package_for_kb971203_sc_1~31bf3856ad364e35~x86~~ Applicable18,32217-Jul-200910:17Not Applicable
Package_for_kb971203_sc~31bf3856ad364e35~x86~~ Applicable1,70317-Jul-200910:17Not Applicable
Package_for_kb971203_server_0~31bf3856ad364e35~x86~~ Applicable37,63717-Jul-200910:17Not Applicable
Package_for_kb971203_server_1~31bf3856ad364e35~x86~~ Applicable18,04917-Jul-200910:17Not Applicable
Package_for_kb971203_server~31bf3856ad364e35~x86~~ Applicable1,71517-Jul-200910:17Not Applicable
X86_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.0.6001.22473_none_9dcca4ddc11af550.manifestNot Applicable42,65116-Jul-200917:58Not Applicable
X86_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.0.6002.22175_none_9fb51759be3f7d22.manifestNot Applicable42,65116-Jul-200917:38Not Applicable

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

File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.0.6001.22473_none_f9eb406179786686.manifestNot Applicable42,69116-Jul-200918:21Not Applicable
Amd64_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.0.6002.22175_none_fbd3b2dd769cee58.manifestNot Applicable42,69116-Jul-200917:37Not Applicable
Package_for_kb971203_sc_0~31bf3856ad364e35~amd64~~ Applicable38,05417-Jul-200910:17Not Applicable
Package_for_kb971203_sc_1~31bf3856ad364e35~amd64~~ Applicable18,52317-Jul-200910:17Not Applicable
Package_for_kb971203_sc~31bf3856ad364e35~amd64~~ Applicable1,71317-Jul-200910:17Not Applicable
Package_for_kb971203_server_0~31bf3856ad364e35~amd64~~ Applicable37,97317-Jul-200910:17Not Applicable
Package_for_kb971203_server_1~31bf3856ad364e35~amd64~~ Applicable18,24817-Jul-200910:17Not Applicable
Package_for_kb971203_server~31bf3856ad364e35~amd64~~ Applicable1,72517-Jul-200910:17Not Applicable