Perfmon Counters and NPS
I wanted to fetch data from Microsoft NPS, which appears to be thoroughly exposed via Perfmon. I generally understand how to collect the data by referencing existing Perfmon datasources like SMTP.
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Forum Discussion
Yes, that will help. The difference between counter and derive is that counter expects rollover only at 32-bit or 64-bit boundaries. Derive accommodates for that but trusts that you'll put in a valid range for the datapoint so that odd results get discarded.
Both counter and derive take the delta between the two polls and divides by the poll cycle between them in seconds. So you should end up with a rate per second.
