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FIX: Trace Flag -T8002 Treats Affinity Masks Like Process Affinities
Article ID: 818765 - View products that this article applies to.
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.
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. 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.
Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.
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
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
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.