DebugDiag PerfAnalysis fails with System.ArgumentException RRS feed

  • Question

  • I am trying to debug high CPU usage in an IIS app pool on a Windows 2012 R2 server. I have installed DebugDiag v2 Update 3 and collected dumps of the IIS app pool whenever its CPU usage goes above a specified threshold.

    I was able to get 11 dumps generated - 10 mini dumps and 1 full dump. However, when I open the DebugDiag Analysis tool and load any (or all) of the dump files and do a PerfAnalysis, it always fails with the error System.ArgumentException, no matter what I try. I have tried to do this multiple times, and I still get the same error every time I try to analyse the files.

    Has anyone been able to successfully do a Perf Analysis? I tried the crash analysis and it seems to work fine; it's only the Perf Analysis which errors out.

    Here is the kind of error I see every time I try to do a PerfAnalysis: 

    Friday, May 10, 2019 5:15 PM

All replies

  • Hello,

    Actually, I suggest you using DebugDiag v2 Update 2 rather than DebugDiag v2 Update 3.

    Here is my test step. When I tested the DebugDiag v2 Update 3 in Win10 and Win8.1, I met this error too. I used DebugDiag Diagnostic Tool to collect Dumps, I can't set the Dump Target as Web application pool, it allways shows me this error:

    So I set Dump Target as Executable and Selected Target as cmd.exe.

    A few minutes later, I got five .dump file. When I use DebugDiag Analysis(Update 3), I still got the same error as what you had got.

    Then I uninstalled the DebugDiag v2 Update 3 and installed the DebugDiag v2 Update 2, used DebugDiag Diagnostic Tool to collect the Dumps again, and use the DebugDiag Analysis(Update 2), it show me these.

    So I think you could have a try, maybe DebugDiag v2 Update 2 will work for you.

    Best Wishes,

    Jack Zhang

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    Tuesday, May 14, 2019 8:11 AM