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Heavy WAN usage after you restart centralized Windows Server 2008 R2-based domain controllersArticle ID: 2671874 - View products that this article applies to. On This PageSymptomsConsider the following scenario:
CauseThis issue occurs because the clients update the Active Directory Service Interfaces (ADSI) schema cache after you restart the domain controllers. This issue also occurs if the aggregate schema is not updated, because the time stamps are not tracked by the domain controllers correctly. Some components of the Group Policy engine (for example, the Group Policy Preferences and Windows Management Instrumentation (WMI) filter of a Group Policy Object) may use Active Directory Service Interfaces to retrieve information from Active Directory. This operation consumes lots of WAN bandwidth and causes heavy CPU usage on the domain controller. Therefore, the system startup time and the user logon time are longer than expected. ResolutionThe following hotfix package resolves the issue on the Windows Server 2008 R2-based domain controllers. To resolve this issue, install the following hotfix package on the Windows Server 2008 R2-based domain controllers. After you install the following hotfix on the domain controllers, the performance of time stamp processing on the aggregate schema is improved. The domain controller uses the most recently changed time stamp of the full schema as the primary tracking mechanism for the aggregate schema. Hotfix informationA 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=support 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.
(http://support.microsoft.com/contactus/?ws=support)
PrerequisitesTo apply this hotfix, you must be running Windows Server 2008 R2 or Windows Server 2008 R2 Service Pack 1 (SP1).For more information about how to obtain a Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base: 976932
(http://support.microsoft.com/kb/976932/
)
Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2 Registry informationTo apply this hotfix, you do not have to make any changes to the registry.Restart requirementYou must restart the computer after you apply this hotfix.Hotfix replacement informationThis hotfix does not replace a previously released hotfix.File informationThe 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 Server 2008 R2 file information notesImportant 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.
For all supported x64-based versions of Windows Server 2008 R2Collapse this table
StatusMicrosoft 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
(http://support.microsoft.com/kb/824684/
)
Description of the standard terminology that is used to describe Microsoft software updates
Additional file informationAdditional file information for Windows Server 2008 R2Additional files for all supported x64-based versions of Windows Server 2008 R2Collapse this table
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