Performance Counter InstanceName issue
I was creating a performance counter collection to register the processing time for ASP.NET requests, and I decided the best way to name instances was to use Request.Url.Authority + Request.Url.PathAndQuery. This counters would allow me to check average response time, total requests and requests per second, for each Request.Url.Authority + Request.Url.PathAndQuery.
I built the counters and I decided to create a _total instance too, to sum up all the requests being made to the server.
Rarely, the _total instance worked like a charm when looking at it in PerfMon, but the other instances (for example, localhost/Test.aspx?query=x) didn’t show a value, they all showed “—” in the report view of PerfMon. I had no idea what the problem was, but I saw that the failing counters showed up in the counters list with localhost in the Parent column and Test.aspx?query=x in the Instance column.
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