I am trying to load a WCF test service using (IIS6 / Server2003 / BasicHttpBinding). The service is throttled as follows:
<serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="100" maxConcurrentInstances="100"/>
To estimate the number of calls on the server, I use ServiceModelService 3.0.0.0 performance counters. If I turn off maxConcurrentCalls to 20, 15, 10, or something less, then the instance performance counter shows that WCF respects throttling. However, if I change maxConcurrentCalls to 30, I can never get instances to move above 24. In addition, Calls Outstanding never exceeds 24. What else could be the WCF limitation?
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