Error events logged by the Performance Library often result from problems with extensible counters. These usually involve failures in loading or executing the functions in the DLLs for the counters.
By default, Performance Library logs errors in loading and executing extensible counters to the Event Viewer application event log, but it does not log warnings or informational messages. If you are monitoring an application using counters that did not come with Windows NT, or if you are having trouble loading or reading these counters, check the Event Viewer application log routinely. If you find errors, you can increase the logging level to show more detail.
Performance Library logging levels are:
Logging Level | Description | |
0 | No logging. | |
1 | Errors only. (This is the default.) | |
2 | Errors and warnings. | |
3 | Errors, warnings, information, and success/failure conditions. | |
To change the Performance Library logging level, use a Registry Editor, such as Regedt32.exe. Add the EventLogLevel value entry or change its value, and then restart Performance Monitor.
Subtree | HKEY_LOCAL_MACHINE |
Key | \Software\Microsoft\WindowsNT\CurrentVersion\Performance Library |
Name | EventLogLevel |
Type | REG_DWORD |
Values | 0, 1, 2, 3 |
Note
Changes to the Performance Library logging level take effect on the local computer when its copy of Performance Monitor is restarted. If remote computers are monitoring the system, then the local computer needs to be restarted or remote sessions need to be restarted to see the change.
Check the Application Event Log routinely. You can use the Find or Filter Events options to display events with Source = PERFLIB.
If you encounter errors with extensible counters, consult the provider.