Microsoft KB Archive/818768

= FIX: Cannot Set SQL Server Instance Specific Network Affinity =

Article ID: 818768

Article Last Modified on 10/25/2005

-

APPLIES TO


 * Microsoft SQL Server 2000 Service Pack 3

-



BUG #: 469418 (SHILOH_BUGS)



SYMPTOMS
You may not be able to set the network affinity for a particular instance of SQL Server.



Service pack information
To resolve this problem, obtain the latest service pack for Microsoft SQL Server 2000. For additional 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
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.   Date         Time   Version         Size             File name ---  26-Feb-2003  03:41  2000.80.777.0      29,244 bytes  Dbmslpcn.dll 25-Apr-2003 02:12                    786,432 bytes  Distmdl.ldf 25-Apr-2003 02:12                  2,359,296 bytes  Distmdl.mdf 30-Jan-2003 01:55                        180 bytes  Drop_repl_hotfix.sql 07-Apr-2003 19:15  2000.80.801.0   1,557,052 bytes  Dtsui.dll 24-Apr-2003 02:51                    747,927 bytes  Instdist.sql 30-Jan-2003 01:55                      1,402 bytes  Inst_repl_hotfix.sql 08-Feb-2003 06:40  2000.80.765.0      90,692 bytes  Msgprox.dll 01-Apr-2003 02:07                      1,873 bytes  Odsole.sql 05-Apr-2003 01:46  2000.80.800.0      62,024 bytes  Odsole70.dll 02-Apr-2003 21:48  2000.80.796.0      57,904 bytes  Osql.exe 02-Apr-2003 23:15  2000.80.797.0     279,104 bytes  Pfutil80.dll 04-Apr-2003 21:27                  1,083,467 bytes  Replmerg.sql 04-Apr-2003 21:53  2000.80.798.0     221,768 bytes  Replprov.dll 08-Feb-2003 06:40  2000.80.765.0     307,784 bytes  Replrec.dll 01-Apr-2003 02:23                  1,084,828 bytes  Replsys.sql 16-Apr-2003 22:39                    115,892 bytes  Sp3_serv_uni.sql 07-Apr-2003 17:44                     25,172 bytes  Sqldumper.exe 19-Mar-2003 18:20  2000.80.789.0      28,672 bytes  Sqlevn70.rll 24-Apr-2003 05:39  2000.80.811.0     176,696 bytes  Sqlmap70.dll 08-Feb-2003 06:40  2000.80.765.0      57,920 bytes  Sqlrepss.dll 30-Apr-2003 23:52  2000.80.816.0   7,540,817 bytes  Sqlservr.exe 08-Feb-2003 06:40  2000.80.765.0      45,644 bytes  Sqlvdi.dll 26-Feb-2003 03:41  2000.80.777.0      29,244 bytes  Ssmslpcn.dll 26-Feb-2003 03:41  2000.80.777.0      82,492 bytes  Ssnetlib.dll 30-Apr-2003 23:52  2000.80.816.0      45,132 bytes  Ums.dll 28-Feb-2003 01:34  2000.80.778.0      98,872 bytes  Xpweb70.dll Note Because of file dependencies, the most recent hotfix or feature that contains the files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.



MORE INFORMATION
With this fix, you can set the incoming Tabular Data Stream (TDS) network affinity for an instance of SQL Server by using the -N## (case sensitive) startup parameter.

SQL Server uses a high priority thread to handle incoming TDS I/O completion activities. The network thread can be affinitized to a processor by providing the –N## startup parameter. The mask passed to the –N## startup parameter is used in a SetThreadAffinityMask call to establish the network threads affinity.

By default, the network affinity is not set. However, if you must establish network affinity for the server that is running SQL Server, Microsoft recommends that you set the mask to the last physical processor. When you set the affinity mask to the last physical processor of your computer, all incoming connection activity is automatically affinitized with the last physical processor, and the UMS scheduler associated with the last processor is correctly weighted to allow more network based activities.

For high end systems, you can combine the -N## startup parameter with the –I## command line parameter, the sp_configure stored procedure &quot;‘affinity mask&quot;, and the Virtual Interface Architecture (VIA) card affinity settings to manage the SQL Server resources.

