Article ID: 332004 - Last Review: February 11, 2005 - Revision: 4.0

FIX: SQL Server Scalability May Be Limited if AWE Is Enabled

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This article was previously published under Q332004

SYMPTOMS

If you run SQL Server on multiprocessor computers with Address Windowing Extensions (AWE) enabled, the CPU may not be fully used and SQL Server scalability may be limited under extreme load conditions.

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RESOLUTION

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 (http://support.microsoft.com/kb/290211/ ) How to obtain the latest SQL Server 2000 service pack

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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  Dbmslpcn.dll     
25-Apr-2003  02:12                    786,432  Distmdl.ldf
25-Apr-2003  02:12                  2,359,296  Distmdl.mdf
30-Jan-2003  01:55                        180  Drop_repl_hotfix.sql
07-Apr-2003  19:15  2000.80.801.0   1,557,052  Dtsui.dll        
24-Apr-2003  02:51                    747,927  Instdist.sql
30-Jan-2003  01:55                      1,402  Inst_repl_hotfix.sql
08-Feb-2003  06:40  2000.80.765.0      90,692  Msgprox.dll      
01-Apr-2003  02:07                      1,873  Odsole.sql
05-Apr-2003  01:46  2000.80.800.0      62,024  Odsole70.dll     
02-Apr-2003  21:48  2000.80.796.0      57,904  Osql.exe         
02-Apr-2003  23:15  2000.80.797.0     279,104  Pfutil80.dll     
04-Apr-2003  21:27                  1,083,467  Replmerg.sql
04-Apr-2003  21:53  2000.80.798.0     221,768  Replprov.dll     
08-Feb-2003  06:40  2000.80.765.0     307,784  Replrec.dll      
01-Apr-2003  02:23                  1,084,828  Replsys.sql
16-Apr-2003  22:39                    115,892  Sp3_serv_uni.sql
07-Apr-2003  17:44                     25,172  Sqldumper.exe    
19-Mar-2003  18:20  2000.80.789.0      28,672  Sqlevn70.rll
24-Apr-2003  05:39  2000.80.811.0     176,696  Sqlmap70.dll     
08-Feb-2003  06:40  2000.80.765.0      57,920  Sqlrepss.dll     
30-Apr-2003  23:52  2000.80.816.0   7,540,817  Sqlservr.exe     
08-Feb-2003  06:40  2000.80.765.0      45,644  Sqlvdi.dll       
26-Feb-2003  03:41  2000.80.777.0      29,244  Ssmslpcn.dll     
26-Feb-2003  03:41  2000.80.777.0      82,492  Ssnetlib.dll
30-Apr-2003  23:52  2000.80.816.0      45,132  Ums.dll          
28-Feb-2003  01:34  2000.80.778.0      98,872  Xpweb70.dll

Note Because of file dependencies, the most recent hotfix or feature that contains these files may also contain additional files.

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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.

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MORE INFORMATION

AWE memory permits applications to use more memory than is available through standard addressing by dynamically mapping the views of the non-paged memory to the standard address space. SQL Server was unmapping hot pages, causing page contention on "hot" pages that are unmapped. SQL Server was also pushing higher mapping activities than expected. You can use the AWE counters to monitor Microsoft Windows 2000 AWE activity in SQL Server.

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