Microsoft KB Archive/314971

= FIX: Backup of Multi-File Database to Striped Media May Encounter CPU Spin =

Article ID: 314971

Article Last Modified on 9/26/2005

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APPLIES TO


 * Microsoft SQL Server 7.0 Standard Edition

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This article was previously published under Q314971



BUG #: 102190, 102209 (SQLBUG_70)



SYMPTOMS
You may encounter a CPU spin during a SQL Server backup on high-end multi-processor computers. You will most likely see this problem only when you back up a database to striped media (tape or disk) and the database spans multiple database files.



RESOLUTION
To resolve this problem, obtain the latest service pack for Microsoft SQL Server 7.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

301511 INF: How to Obtain the Latest SQL Server 7.0 Service Pack

NOTE: The following hotfix was created prior to Microsoft SQL Server 7.0 Service Pack 4.

The English version of this fix should have the following file attributes or later:   Version     File name -

7.00.1020  Sqlservr.exe NOTE: Because of file dependencies, the most recent hotfix or feature that contains the preceding files may also contain additional files.



WORKAROUND
You may be able to reduce the frequency of this problem by:
 * Reducing the number of database files in the database.

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 * Reducing the number of target media devices that are part of the striped backup.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft SQL Server 7.0 Service Pack 4.



MORE INFORMATION
If this problem occurs, you may see multiple CPUs at a utilization of 100% along with a very high percentage of %Privileged Time, as measured by the Microsoft Windows NT Performance Monitor.

Keywords: kbbug kbfix kbsqlserv700presp4fix kbqfe kbhotfixserver KB314971

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