Monitoring with Performance Counters (IIS 6.0)
Both System Monitor and Performance Logs and Alerts allow you to examine the output of performance counters, which monitor the activity of specific performance objects. Each performance counter is named for the object for which it collects data and the type of data that it collects. For example, the Processor\% ProcessorTime counter is the primary indicator of processor activity, displaying the average percentage of busy time observed during the sample interval.
A performance object often offers a choice of more than one instance. Using the Processor object as an example, if you are monitoring a dual-processor computer, the first processor instance is 0 and the second processor instance is 1. A commonly used instance is the _Total instance, which monitors the sum of the values of a specific counter's instances.
Components of a counter path
The counter path contains the computer name, and the performance object, instance, and counter.It is typically represented in the following way:
The computer name is optional. If you do not designate a computer name, the counter monitors the local computer.
Again, using the Processor object as an example, if you want to monitor the percentage of processor time that your #0 processor uses, your selection is represented in the following way:
Processor (#0)\% ProcessorTime
Sampling methods for counters
Performance counters collect and display their data in one of two ways: