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MSDN TV: Introduction to the CLR Profiler
The CLR Profiler is an invaluable tool for looking under the covers of a running .NET application. In this new MSDN TV episode Peter Solich shows how to use the CLR Profiler to examine object allocation, lifespan, and the effects of the Dispose() method.The common language runtime is the execution engine that executes Microsoft’s .NET applications. CLR profiler is a tool that’s focused on analyzing what’s going on on the garbage collector heap of Microsoft .NET applications. So it’s not a general purpose profiler, but it’s really focused on analyzing exactly what objects get allocated, how long they survive, what stays around and so on and so forth. In the demo, he shows some interesting behavior within a WinForms application. In particular he shows why a locally scoped System.Drawing.Brush object actually stays around longer than other .NET objects based on the fact that it is a wrapper for a Win32 resource. He then shows that the object can be released sooner if the Dispose() method is called which is then displayed in the CLR Profiler.
Watch Introduction to the CLR Profiler.
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Message #157783
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performance monitor is another good tool
in the past, I've used windows performance monitors to track heap and memory usage. this way, when I run stress tests, I can record the memory before, after and at set intervals. the profiler tool is nice. Has anyone tried to run it to profile IIS? I haven't tried myself, just curious to see if others have attempted it.
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Message #158224
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performance monitor is another good tool
I have not tried to use this particular one but my general impression of .NET profilers (after having gone through a dozen of them) is that they are not very impressive. A lot of them simply jam the IIS and you have to wait for ions for something to happen, some of them I never got to work with IIS. I am comparing this to some experiences with Java profilers, and they are a lot nicer. You can watch everything live - memory, threads, performance, bottlenecks, call graphs etc. it all just rolls in the same window 'live' as the program runs without crippling effects to the performance of the profiled app - no manual snapshotting, switching between tools, waiting forever, and it just works.
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Message #158623
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thanks for the info
that saves me the trouble of trying to run the profiler with IIS. Hopefully it will improve over time. Though I wonder how hard it is going to be, since IIS is tied pretty closely to windows. When I profile tomcat or any other servlet container with OptimizeIt, it's straight forward and I can track down leaks, zombie threads or look at the call graph pretty easily.
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Message #158768
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thanks for the info
I think the sorry state of .NET profiles has a lot to do with the .NET instrumentation API. I doubt that it is incredibly difficult to provide the instrumentation data in a nicely packaged user interface. If it were possible to do, I am sure we would have nice .NET profilers available.
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Message #329779
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poor CLR Profilers
I think CLR instrumentation api and lack of AOP languages in .NETi profiler side of .NET is very poor. For example if you work on java profilers especially JxInsight it uses the benefits of AOP very sucessfully.
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