Microsoft KB Archive/103109

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Changes to Performance Monitor After Installing SQL Server

Article ID: 103109

Article Last Modified on 10/31/2006


  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1

This article was previously published under Q103109


After installing SQL Server for Windows NT, additional object and counter choices are available in the Windows NT Performance Monitor. The additional items are:

  • SQLServer
  • SQLServer-Locks
  • SQLServer-Log
  • SQLServer-Users

Each of these four objects has multiple counters that can be selected for monitoring.


The objects and counters for which Performance Monitor provides monitoring can be found in the Registry under the following subkey:

HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\ Perflib\009 under the counters string.

When SQL Server for Windows NT is installed, the counters string is appended to include the objects and counters associated with SQL Server for Windows NT. The last entry in the counters string before installing SQL Server for Windows NT is:

   Pages Input/sec

After installing SQL Server for Windows NT, the last entry in the counters string is:

   Log Space Used(%)

Also changed in the Perflib subkey are the values for "LastCounter" and "LastHelp," which are equal to the hexadecimal value of the last entry of the "Counters" and "Help" strings, respectively, under the 009 subkey.

Additional query words: prodnt

Keywords: KB103109