FIX: Some complex queries are slower after you install SQL Server 2000 Service Pack 2 or SQL Server 2000 Service Pack 3

This article has been archived. It is offered "as is" and will no longer be updated.
Bug #: 473314 (SQL Server 8.0)
Symptoms
After you install Microsoft SQL Server 2000 Service Pack 2 (SP2) or SQL Server 2000 Service Pack 3 (SP3), you may notice that complex queries that contain many join clauses and sub-queries are slower than before.

For a list of all publicly released SQL Server 2000 Post-Service Pack 3a hotfixes, see the following article in the Microsoft Knowledge Base:
810185 SQL Server 2000 hotfix update for SQL Server 2000 Service Pack 3 and 3a
Cause
The SQL Server optimizer has built-in thresholds that determine when to stop or to continue optimizing a query after a plan has been obtained. These thresholds exist to make sure that a balance exists between compilation time and execution time.

In the original released version of SQL Server 2000, a problem with the thresholds was found that caused SQL Server to spend a long time optimizing certain queries. In SQL Server 2000 SP2, a change to the thresholds was made to fix the problem. The new thresholds work well most of the time. However, there are always queries that are right at the boundary of the thresholds that may receive a better execution plan with more optimization.
Resolution

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
290211 How to obtain the latest SQL Server 2000 service pack

Hotfix information

Prerequisites

  • Microsoft SQL Server 2000 Service Pack 3 (SP3).

    For additional information about how to obtain SQL Server 2000 Service Pack 3, click the following article number to view the article in the Microsoft Knowledge Base:
    290211 How to obtain the latest SQL Server 2000 service pack
  • You must also have SQL Server 2000 Hotfix build 2000.80.977 installed.

    For additional information about error messages that you receive when the SQL Server 2000 Post SP3a hotfix build 200.80.977 is not installed, click the following article number to view the article in the Microsoft Knowledge Base:
    888007 You receive a "The product does not have a prerequisite update installed" error message when you try to install a SQL Server 2000 post-Service Pack 3 hotfix
    For additional information about the hotfix installer for SQL Server, click the following article number to view the article in the Microsoft Knowledge Base:
    842960 Description of the 32-bit SQL Server 7.0 and SQL Server 2000 hotfix installer

Restart information

You must restart your computer after you apply this hotfix.

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 tool in Control Panel.

SQL Server 2000 32-bit versions

   Date         Time   Version        Size       File name   ------------------------------------------------------------------   03-Dec-2004  17:49  2000.80.994.0    664,128  Autoplt.dll         03-Dec-2004  17:49  2000.80.994.0     78,400  Console.exe         03-Dec-2004  17:49  2000.80.994.0    332,352  Ctasksui.dll        03-Dec-2004  17:49  2000.80.994.0    315,968  Custtask.dll        03-Dec-2004  17:49  2000.80.994.0     33,340  Dbmslpcn.dll        08-Apr-2004  12:42                   786,432  Distmdl.ldf   08-Apr-2004  12:42                 2,359,296  Distmdl.mdf   30-Sep-2003  13:55                       180  Drop_repl_hotfix.sql   03-Dec-2004  17:49  2000.80.994.0  1,905,216  Dtspkg.dll          03-Dec-2004  17:49  2000.80.994.0    528,960  Dtspump.dll         03-Dec-2004  17:49  2000.80.994.0  1,557,052  Dtsui.dll           03-Dec-2004  17:49  2000.80.994.0    639,552  Dtswiz.dll          30-Sep-2003  13:55                   747,927  Instdist.sql   30-Sep-2003  13:55                     1,581  Inst_repl_hotfix.sql   03-Dec-2004  17:49  2000.80.994.0    352,828  Isqlw.exe           03-Dec-2004  17:49  2000.80.994.0     82,492  Itwiz.exe           03-Dec-2004  17:49  2000.80.994.0     90,692  Msgprox.dll         28-Oct-2004  23:16  8.11.41022.0     226,304  Mssdi98.dll         03-Dec-2004  17:49  2000.80.994.0     62,024  Odsole70.dll        03-Dec-2004  17:50  2000.80.994.0     25,144  Opends60.dll        03-Dec-2004  17:49  2000.80.994.0     57,904  Osql.exe            03-Dec-2004  17:49  2000.80.994.0    279,104  Pfutil80.dll        30-Sep-2003  13:48                   550,780  Procsyst.sql   08-Apr-2004  12:42                    12,305  Qfe469315.sql   08-Apr-2004  12:42                    19,195  Qfe469571.sql   26-Aug-2004  15:14                     5,157  Qfe472197.sql   03-Dec-2004  17:49  2000.80.994.0    143,940  Qrdrsvc.exe         03-Dec-2004  11:25                 1,136,072  Replmerg.sql   03-Dec-2004  17:49  2000.80.994.0    221,768  Replprov.dll        03-Dec-2004  17:49  2000.80.994.0    307,784  Replrec.dll         03-Dec-2004  11:38  2000.80.994.0    159,813  Replres.rll   02-Dec-2004  17:53                 1,088,240  Replsys.sql   30-Sep-2003  13:55                   986,603  Repltran.sql   24-Nov-2004  15:04                        55  Repl_uninstall.sql   03-Dec-2004  17:49  2000.80.994.0    287,304  Rinitcom.dll        03-Dec-2004  17:49  2000.80.994.0     78,416  Sdiclnt.dll         03-Dec-2004  17:49  2000.80.994.0     66,112  Semmap.dll          03-Dec-2004  17:49  2000.80.994.0     57,916  Semnt.dll           03-Dec-2004  17:49  2000.80.994.0    492,096  Semobj.dll          03-Dec-2004  12:08  2000.80.994.0    172,032  Semobj.rll   03-Dec-2004  17:49  2000.80.994.0     53,832  Snapshot.exe        30-Sep-2003  13:48                   117,834  Sp3_serv_uni.sql   03-Dec-2004  17:48  2000.80.994.0     28,672  Sqlagent.dll        03-Dec-2004  17:49  2000.80.994.0    311,872  Sqlagent.exe        03-Dec-2004  17:48  2000.80.994.0    168,001  Sqlakw32.dll        03-Dec-2004  17:49  2000.80.994.0     33,344  Sqlctr80.dll        03-Dec-2004  17:49  2000.80.994.0  4,215,360  Sqldmo.dll          03-Dec-2004  17:49                    25,172  Sqldumper.exe       03-Dec-2004  11:23  2000.80.994.0     28,672  Sqlevn70.rll   03-Dec-2004  17:49  2000.80.994.0    156,224  Sqlmaint.exe        03-Dec-2004  17:49  2000.80.994.0    180,792  Sqlmap70.dll        03-Dec-2004  17:49  2000.80.994.0    188,992  Sqlmmc.dll          03-Dec-2004  12:16  2000.80.994.0    479,232  Sqlmmc.rll   03-Dec-2004  17:49  2000.80.994.0    401,984  Sqlqry.dll          03-Dec-2004  17:49  2000.80.994.0     57,920  Sqlrepss.dll        03-Dec-2004  17:49  2000.80.994.0  7,716,945  Sqlservr.exe        03-Dec-2004  17:49  2000.80.994.0    590,396  Sqlsort.dll         03-Dec-2004  17:49  2000.80.994.0     45,644  Sqlvdi.dll          03-Dec-2004  17:49  2000.80.994.0    106,588  Sqsrvres.dll        03-Dec-2004  17:49  2000.80.994.0     33,340  Ssmsgnet.dll        03-Dec-2004  17:49  2000.80.994.0     33,340  Ssmslpcn.dll        03-Dec-2004  17:49  2000.80.994.0     33,340  Ssmsqlgc.dll        03-Dec-2004  17:49  2000.80.994.0     82,492  Ssnetlib.dll        03-Dec-2004  17:49  2000.80.994.0     25,148  Ssnmpn70.dll        03-Dec-2004  17:49  2000.80.994.0    123,456  Stardds.dll         03-Dec-2004  17:49  2000.80.994.0    158,240  Svrnetcn.dll        03-Dec-2004  17:49  2000.80.994.0     76,416  Svrnetcn.exe        03-Dec-2004  17:49  2000.80.994.0     49,228  Ums.dll             03-Dec-2004  17:49  2000.80.994.0     74,304  Xplog70.dll         03-Dec-2004  17:49  2000.80.994.0     98,872  Xpweb70.dll      
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
More information
To enable this hotfix, trace flag 9062 must be activated. This is a dynamic trace flag that you can activate by using one of the following methods:

Activate flag 9062 by using SQL Query Analyzer

  1. Open SQL Query Analyzer.
  2. Connect to the related SQL Server-based computer.
  3. Copy the following code to the Query window:
    DBCC TRACEON(9062 , -1)
  4. Click Execute.
  5. Quit SQL Query Analyzer.

Add -T9062 to the SQL Server startup parameters

  1. Open SQL Enterprise Manager.
  2. Expand Microsoft SQL Servers, expand SQL Server Group, right-click the related SQL Server, and then click Properties.
  3. On the General tab, click Startup Parameters.
  4. In the Parameter box, type -T9062, and then click Add.
  5. Click OK two times, and then quit SQL Enterprise Manager.
  6. Restart the related SQL Server.
For additional 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 additional information about the terminology that Microsoft uses when it corrects software after it is released, 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
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Article ID: 890942 - Last Review: 01/17/2015 09:35:25 - Revision: 3.0

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