How to profile object creation in Java?

Posted by gooli on Stack Overflow See other posts from Stack Overflow or by gooli
Published on 2010-03-16T18:29:21Z Indexed on 2010/03/16 18:31 UTC
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Filed under:

java

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gc

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performance-tuning

The system I work with is creating a whole lot of objects and garbage collecting them all the time which results in a very steeply jagged graph of heap consumption. I would like to know which objects are being generated to tune the code, but I can't figure out a way to dump the heap at the moment the garbage collection starts. When I tried to initiate dumpHeap via JConsole manually at random times, I always got results after GC finished its run, and didn't get any useful data.

Any notes on how to track down excessive temporary object creation are welcome.

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