Version

Windows 3.1 to Windows 2008

Date

19 Apr 1999

Summary

Occasionally when accessing an NT performance counter NT generates a Perflib error in the System or Application event logs.

This is a known issue with several performance DLLs such as those for SNA Server, Compaq Insight Manager, and Exchange.

These errors are not consistent — they can occur on one machine but not another, allegedly identical, machine.

Technical Background

N/A

Resolution

The simplest workaround for this Microsoft issue is to rename the registry key that loads the performance DLL.

For example:

• Using REGEDIT (not REGEDT32 – it does not support rename)
• HKLM — rename the “Performance” key to “XPerformance”.
• If the production schedule allows, Reboot the machine for changes to take effect.
• This will disable the performance counter. You will be unable to use this counter with any performance monitor.

Reference: Microsoft Support articles Q180054 and Q186713.

This issue has nothing to do with Argent.

To prove this, you can use the built-in PerfMon to access the server with the issue; the same errors will appear.