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Since last month, we got a problem on our company's server (Win2008ServerStd + IIS7 + CF enterprise 9.0.1 (hotfix2)).

I used jConsole to monitor the Coldfusion JVM (1.6.0_24) activity and here's what I see:

Can you see that curve?

Strange curve

Notice that strange "curve" between 14:10 and 14:15 ! What is that?

Obviously it's not a standard behaviour, when it happens, my applications hang for 30 to 70 seconds!

Do you know what can cause that memory issue? It seems like GC does not run correctly, or hangs itself.

I don't expect a flash-answer, I wonder there can be a lot of root problems causing that but.... where can I start investigating?

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Does this happen at the same time every day? If so, do you have any scheduled processes that are running on the CF server? –  Dan Short Apr 19 '12 at 14:55
    
already tought it! We disabled all scheduled tasks for that however.... none of them occured in that times! :( –  Fabio B. Apr 19 '12 at 14:57
    
Are you running any <cfthread> s –  James A Mohler Dec 7 '12 at 21:05
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