FIX: SQL Server Analysis Services 2005 system performance may be slow after you use the ADOMD.NET data provider to run an MDX query that returns a large result set from a cube (919731)


The information in this article applies to:

  • Microsoft SQL Server 2005 Analysis Services
Bug #: 832 (SQL Hotfix)
Bug #: 719 (SQL Hotfix)
Bug #: 434926 (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 this hotfix package
  • The prerequisites for installing the hotfix package
  • Information about whether you must restart the computer after you install the hotfix package
  • Information about whether the hotfix package is replaced by any other hotfix package
  • Information about whether you must make any registry changes
  • The files that are contained in the hotfix package

SYMPTOMS

Consider the following scenario. You use the ADOMD.NET data provider in Microsoft SQL Server 2005 Analysis Services to run a Multidimensional Expressions (MDX) query. The MDX query retrieves a large result set from a cube. In this scenario, SQL Server 2005 system performance may be slow. When this problem occurs, the duration of the process to retrieve a result set increases exponentially as the number of rows that the query returns in the result set increases.

Note You may not notice decreased performance for queries that contain fewer than 5,000 rows.

CAUSE

This problem occurs because the ADOMD.NET data provider incorrectly keeps track of the current position in the result set. When the ADOMD.NET data provider incorrectly keeps track of the current position in the result set, each request to retrieve a row requires Analysis Services to iterate from the start of the result set to the requested row.

For example, a request to retrieve rows 499 and 500 requires Analysis Services to iterate row 001 to row 499, iterate row 001 to row 499 again, and then iterate row 500.

RESOLUTION

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 Analysis Services 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

You must have Microsoft SQL Server 2005 Analysis Services Service Pack 1 (SP1) installed to apply this hotfix.

For more information about how to obtain SQL Server 2005 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

913089 How to obtain the latest service pack for SQL Server 2005

Restart information

After you apply this hotfix, you do not have to restart the computer if the following conditions are true:
  • If Analysis Services is running as a named instance, you stop the SQL Server Browser service before you apply this hotfix.
  • You exit all Analysis Services tools and all client applications before you apply this hotfix.
  • You exit Microsoft Internet Information Services (IIS) before you apply this hotfix.

Registry information

You do not have to change the registry.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 of 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.SQL Server 2005 Analysis Services hotfix, 32-bit
File nameFile versionFile sizeDateTimePlatform
Microsoft.sqlserver.sqlenum9.0.2167.0908,06420-Jun-200615:37Not Applicable
Ms.ss.mgdsqldumper.dll2005.90.2167.075,55220-Jun-200615:29Not Applicable
Msadomdx.dll9.0.2167.0502,56020-Jun-200615:35Not Applicable
Msmdlocal.dll9.0.2167.015,662,36820-Jun-200615:32Not Applicable
Msmdsrv.exe9.0.2167.014,635,29620-Jun-200615:32Not Applicable
Msmgdsrv.dll9.0.2167.05,948,70420-Jun-200615:32Not Applicable
Msmgdsrv.dll9.0.2167.05,948,70420-Jun-200615:32Not Applicable
Msolap90.dll9.0.2167.04,210,97620-Jun-200615:32Not Applicable
Sbmsmdlocal.dll9.0.2167.015,662,36820-Jun-200615:32Not Applicable
SQL Server 2005 Analysis Services hotfix, 64-bit
File nameFile versionFile sizeDateTimePlatform
Microsoft.sqlserver.sqlenum9.0.2167.0875,29620-Jun-200615:31Not Applicable
Ms.ss.mgdsqldumper.dll2005.90.2167.075,55220-Jun-200615:29Not Applicable
Ms.ss.mgdsqldumper.dll2005.90.2167.091,42420-Jun-200615:30Not Applicable
Msadomdx.dll9.0.2167.0502,56020-Jun-200615:35Not Applicable
Msmdlocal.dll9.0.2167.015,662,36820-Jun-200615:32Not Applicable
Msmdlocal.dll9.0.2167.030,230,81620-Jun-200615:32Not Applicable
Msmdsrv.exe9.0.2167.029,551,39220-Jun-200615:32Not Applicable
Msmgdsrv.dll9.0.2167.05,948,70420-Jun-200615:32Not Applicable
Msmgdsrv.dll9.0.2167.08,931,61620-Jun-200615:32Not Applicable
Msolap90.dll9.0.2167.04,210,97620-Jun-200615:32Not Applicable
Msolap90.dll9.0.2167.05,681,95220-Jun-200615:31Not Applicable
Sbmsmdlocal.dll9.0.2167.015,662,36820-Jun-200615:32Not Applicable
SQL Server 2005 Analysis Services hotfix, 64-bit for Itanium processors
File nameFile versionFile sizeDateTimePlatform
Microsoft.sqlserver.sqlenum9.0.2167.0875,29620-Jun-200606:39Not Applicable
Ms.ss.mgdsqldumper.dll2005.90.2167.075,55220-Jun-200615:29Not Applicable
Ms.ss.mgdsqldumper.dll2005.90.2167.0163,10420-Jun-200606:41Not Applicable
Msadomdx.dll9.0.2167.0502,56020-Jun-200615:35Not Applicable
Msmdlocal.dll9.0.2167.015,662,36820-Jun-200615:32Not Applicable
Msmdlocal.dll9.0.2167.048,738,59220-Jun-200606:39Not Applicable
Msmdsrv.exe9.0.2167.047,763,74420-Jun-200606:39Not Applicable
Msmgdsrv.dll9.0.2167.05,948,70420-Jun-200615:32Not Applicable
Msmgdsrv.dll9.0.2167.012,872,48020-Jun-200606:39Not Applicable
Msolap90.dll9.0.2167.04,210,97620-Jun-200615:32Not Applicable
Msolap90.dll9.0.2167.07,709,98420-Jun-200606:39Not Applicable
Sbmsmdlocal.dll9.0.2167.048,738,59220-Jun-200606:39Not Applicable

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:9/13/2006
Keywords:kbBug kbfix kbtshoot kbQFE kbhotfixserver kbpubtypekc KB919731 kbAudITPRO kbAudDeveloper
©2004 Microsoft Corporation. All rights reserved.