Microsoft KB Archive/818765

= FIX: Trace Flag -T8002 Treats Affinity Masks Like Process Affinities =

Article ID: 818765

Article Last Modified on 10/25/2005

-

APPLIES TO


 * Microsoft SQL Server 2000 Service Pack 2

-





SUMMARY
This fix introduces a new startup trace flag, –T8002. With trace flag –T8002, you can change the meaning of the affinity mask so that it is treated like a process affinity.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.

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

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

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.

The English version of this fix has the file attributes (or later) 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.  Date        Time   Version        Size             File name -- 24-Jan-2003 18:53  2000.80.732.0      29,244 bytes  Dbmslpcn.dll 18-Jan-2003 02:23                    786,432 bytes  Distmdl.ldf 18-Jan-2003 02:23                  2,359,296 bytes  Distmdl.mdf 11-Dec-2002 17:50                        180 bytes  Drop_repl_hotfix.sql 02-Jul-2002 15:35  2000.80.650.0     107,088 bytes  Impprov.dll 17-Jan-2003 20:33                    774,409 bytes  Instdist.sql 11-Dec-2002 17:50                      1,402 bytes  Inst_repl_hotfix.sql 20-Aug-2002 16:24  2000.80.679.0     111,172 bytes  Logread.exe 15-Dec-2002 23:21  2000.80.717.0      90,692 bytes  Msgprox.dll 05-Mar-2003 18:17  2000.80.736.0      62,024 bytes  Odsole70.dll 03-Jan-2002 01:59                     18,185 bytes  Qfe356326.sql 20-Aug-2002 16:47  2000.80.679.0     135,748 bytes  Qrdrsvc.exe 26-Aug-2002 22:49  2000.80.679.0     406,088 bytes  Rdistcom.dll 04-Oct-2001 01:36                    437,302 bytes  Replcom.sql 20-Aug-2002 16:33  2000.80.679.0     152,136 bytes  Replmerg.exe 25-Nov-2002 21:43                  1,004,990 bytes  Replmerg.sql 15-Dec-2002 23:21  2000.80.717.0     221,768 bytes  Replprov.dll 15-Dec-2002 23:21  2000.80.717.0     303,688 bytes  Replrec.dll 22-Jan-2003 19:27                  1,002,101 bytes  Replsys.sql 04-Oct-2001 01:36                    881,228 bytes  Repltran.sql 26-Aug-2002 22:49  2000.80.679.0     283,208 bytes  Rinitcom.dll 16-Sep-2002 22:31                    390,045 bytes  Securityhotfix.sql 26-Aug-2002 22:49  2000.80.679.0      28,672 bytes  Sqlagent.dll 26-Aug-2002 18:39  2000.80.679.0     311,872 bytes  Sqlagent.exe 28-Aug-2002 16:32  2000.80.679.0      49,152 bytes  Sqlagent.rll 26-Aug-2002 22:49  2000.80.679.0      53,824 bytes  Sqlcmdss.dll 28-Aug-2002 16:40  2000.80.679.0      12,288 bytes  Sqlcmdss.rll 14-Jan-2003 21:39  2000.80.725.0     172,600 bytes  Sqlmap70.dll 02-May-2003 18:44  2000.80.743.0   7,483,473 bytes  Sqlservr.exe 01-Nov-2002 18:56  2000.80.698.0      45,644 bytes  Sqlvdi.dll 24-Jan-2003 18:53  2000.80.732.0      29,244 bytes  Ssmslpcn.dll 24-Jan-2003 18:53  2000.80.732.0      82,492 bytes  Ssnetlib.dll 02-Jan-2003 20:12  2000.80.722.0      25,148 bytes  Ssnmpn70.dll 02-May-2003 18:44  2000.80.743.0      49,228 bytes  Ums.dll 07-Apr-2002 02:08  2000.80.606.0      70,208 bytes  Xplog70.dll 07-Apr-2002 02:08  2000.80.606.0      53,828 bytes  Xpqueue.dll 07-Apr-2002 02:08  2000.80.606.0     156,228 bytes  Xprepl.dll 12-Jul-2002 01:00  2000.80.658.0     279,104 bytes  Xpstar.dll 16-Sep-2002 23:12  2000.80.686.0      98,872 bytes  Xpweb70.dll Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
By default, the affinity mask for SQL Server is set to zero, permitting the SQL Server worker threads to use any available processor. When the affinity mask is set, the SQL Server worker thread is affinitized, and the worker thread can only use one specified processor. The addition of the SQL Server startup trace flag –T8002 treats the affinity mask like a process affinity and invokes the SetThreadAffinityMask function. However, the SQL Server thread affinity is set to all bits supplied in the affinity mask when the trace flag is used.

For example, if the affinity mask is set to 0x3 (processor 0 and 1) and the trace flag –T8002 is not used, half of the worker threads are affinitized to processor 1 and the other half are affinitized to processor 2. However, when the trace flag –T8002 is enabled and the affinity mask is set to 0x3, the worker threads are affinitized to both processors. If you set the trace flag and the affinity mask, you can limit the overall processors that SQL Server uses.

Keywords: kbbug kbfix kbqfe kbhotfixserver KB818765

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.