FIX: Improved CPU Usage for Database Logging When Transaction Log Stalls Occur

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BUG #: 469415 (SQL Server 8.0)
If transaction log stalls occur, a computer running SQL Server may experience CPU usage that was not expected. This usage occurs because of poor log file performance or because database backups are in progress.

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 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   --------------------------------------------------------------   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.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft SQL Server 2000 Service Pack 4.
The problem can be triggered by snapshot backups because the snapshot backup process involves the freeze and thaw of I/O operations. The freeze activity holds up all physical I/O activity until the thaw is issued at the end of the snapshot backup operation. In doing so, a code change that was made in SQL Server 2000 Service Pack 2 (SP2) results in heavier CPU usage than in earlier versions of SQL Server. The scalability change in SQL Server 2000 SP2 makes the log code scale better on multiprocessor computers. This change can, however, result in heavier CPU usage under rare conditions.

Article ID: 818767 - Last Review: 02/27/2014 21:18:37 - Revision: 2.1

  • Microsoft SQL Server 2000 Service Pack 3
  • Microsoft Windows 2000 Standard Edition
  • kbnosurvey kbarchive kbhotfixserver kbqfe kbqfe kbsqlserv2000presp4fix kbfix kbbug KB818767