FIX: SQL Server 2005 system performance may be slow when you use a keyset-driven cursor to execute a FETCH statement (917738)


The information in this article applies to:

  • Microsoft SQL Server 2005 Standard Edition
  • Microsoft SQL Server 2005 Standard X64 Edition
  • SQL Server 2005 Standard Edition for Itanium-based Systems
  • Microsoft SQL Server 2005 Enterprise Edition
  • Microsoft SQL Server 2005 Enterprise X64 Edition
  • Microsoft SQL Server 2005 Enterprise Edition for Itanium Based Systems
  • Microsoft SQL Server 2005 Developer Edition
Bug #: 50000116 (SQL Hotfix)
Bug #: 432151 (SQLBUDT)
Microsoft distributes Microsoft SQL Server 2005 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 2005 fix release.

SUMMARY

This article describes the following about this hotfix release:
  • The issues that are fixed by the hotfix package
  • The prerequisites for installing the hotfix package
  • Whether you must restart the computer after you install the hotfix package
  • Whether you must make any registry changes
  • The files that are contained in the hotfix package

SYMPTOMS

Microsoft SQL Server 2005 system performance may be slow when the following conditions are true:
  • You use a keyset-driven cursor to execute a FETCH statement.
  • The SELECT query contains a condition in the WHERE clause.
  • The columns in the condition have both a clustered index and a nonclustered index.

CAUSE

This problem occurs when the following conditions are true:
  • The query plan to execute the FETCH statement is chosen during the trivial plan stage.

    Note The first stage of SQL Server optimization is called the trivial plan stage.
  • Two or more indexes can be used for the query plan to execute the FETCH statement.

RESOLUTION

Cumulative hotfix package information

To resolve this problem, install the cumulative hotfix package (build 2153) for SQL Server 2005. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

918222 Cumulative hotfix package (build 2153) for SQL Server 2005 is available

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next SQL Server 2005 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

There are no prerequisites for this hotfix.

Restart information

You do not have to restart the computer after you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix file information

This hotfix contains only those files that are required to correct the issues that this article lists. This hotfix may not contain all the files that you must have to fully update a product to the latest build.

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.
File nameFile versionFile sizeDateTimePlatform
Microsoft.sqlserver.replication.dll2005.90.1539.01,608,48011-Apr-200614:42x86
Microsoft.sqlserver.smo.dll9.0.1539.01,559,32811-Apr-200614:42x86
Microsoft.sqlserver.sqlenum.dll9.0.1539.0895,77611-Apr-200614:42x86
Msmdlocal.dll9.0.1539.015,599,90411-Apr-200614:43x86
Msmdredir.dll9.0.1539.03,929,88811-Apr-200614:42x86
Mssqlsystemresource.ldfNot applicable524,28811-Apr-200610:03Not applicable
Mssqlsystemresource.mdfNot applicable39,780,35211-Apr-200610:03Not applicable
Osql.exe2005.90.1539.051,48811-Apr-200614:41x86
Replrec.dll2005.90.1539.0781,08811-Apr-200614:42x86
Sqlaccess.dll2005.90.1539.0349,47211-Apr-200614:41x86
Sqldiag.exe2005.90.1539.0960,28811-Apr-200614:42x86
Sqlservr.exe2005.90.1539.028,780,88811-Apr-200614:43x86

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, 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

Modification Type:MajorLast Reviewed:8/11/2006
Keywords:kbHotfixServer kbBug kbfix kbtshoot kbQFE kbpubtypekc KB917738 kbAudITPRO kbAudDeveloper
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