FIX: The SQL Server Utility dashboard may report incorrect CPU usage on DAC databases in SQL Server 2008 R2

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Article ID: 2163958 - View products that this article applies to.
Microsoft distributes Microsoft SQL Server 2008 R2 fixes as one downloadable file. Because the fixes are cumulative, each new release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 R2 fix release.
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SYMPTOMS

Consider the following scenario.
  • You use SQL Server Utility to monitor some data-tier application (DAC) databases in Microsoft SQL Server 2008 R2.
  • A session on one of the DAC databases changes the database context to another DAC database.
In this scenario, the SQL Server Utility dashboard shows an incorrect CPU usage for these two databases. In some cases, the SQL Server Utility dashboard reports that the CPU usage on the new DAC database is high. However, the actual CPU usage on the new DAC database is low.

CAUSE

This problem occurs because the CPU time that the session uses on the original DAC database is calculated incorrectly to the new DAC database.

RESOLUTION

To resolve this problem, apply the cumulative update package 2 for SQL Server 2008 R2 on each instance of SQL Server 2008 R2 that is enrolled with the UCP.

Important After you apply the cumulative update package, the SQL Server Utility dashboard will show correct CPU usage from now on. However, the CPU usage history that was collected before you apply this cumulative update package will not be corrected.

Cumulative update information

The fix for this issue was first released in Cumulative Update 2. For more information about how to obtain this cumulative update package for SQL Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:
2072493 Cumulative update package 2 for SQL Server 2008 R2
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 R2 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
981356 The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 was released

SQL Server 2008 Service Pack 2

The fix for this issue was first released in Cumulative Update 3 for SQL Server 2008 Service Pack 2. For more information about this cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2498535 Cumulative update package 3 for SQL Server 2008 Service Pack 2
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 fix release. Microsoft recommends that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2402659 The SQL Server 2008 builds that were released after SQL Server 2008 Service Pack 2 was released
Microsoft SQL Server 2008 hotfixes are created for specific SQL Server service packs. You must apply a SQL Server 2008 Service Pack 2 hotfix to an installation of SQL Server 2008 Service Pack 2. By default, any hotfix that is provided in a SQL Server service pack is included in the next SQL Server service pack.

STATUS

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

REFERENCES

For information about the Incremental Servicing Model for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
935897 An Incremental Servicing Model is available from the SQL Server team to deliver hotfixes for reported problems
For more information about the naming schema for SQL Server updates, click the following article number to view the article in the Microsoft Knowledge Base:
822499 New naming schema for Microsoft SQL Server software update packages
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

Properties

Article ID: 2163958 - Last Review: March 21, 2011 - Revision: 2.0
APPLIES TO
  • Microsoft SQL Server 2008 R2 Enterprise
  • Microsoft SQL Server 2008 R2 Datacenter
  • Microsoft SQL Server 2008 R2 Developer
  • Microsoft SQL Server 2008 R2 Standard
  • Microsoft SQL Server 2008 R2 Web
  • Microsoft SQL Server 2008 R2 Workgroup
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseadvanced KB2163958

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