>>>>> "TB" == Travis Bemann
><[EMAIL PROTECTED]> writes:
TB> One possible memory leak is the protected/private memory leak,
TB> which is a major problem in Java that is somewhat equivalent
TB> to the classical memory leak in languages such as C and C++.
Travis,
I'm not sure I understand the problem you're explaining (although it
sounds completely plausible). Could you maybe post a code sample that
illustrates this memory overuse? (Scott seems determined not to call
it a "leak", which I guess it isn't technically.)
A couple of places I would look at for memory probs, just off the top
of my noggin:
1) The StandardDataStore* uses a hash and an array for storing
the same DSItems. This kind of rings some bells about
circular refs and whatnot, and it -seems- like
2) The thread pools.** Creating new threads -does- eat memory,
and having a ton of them around might be a problem. I've
noticed that if I reduce the maximumConnectThreads
parameter for my node to 10-15 from the default 50, memory
usage stays in the 10-20Mb range rather than up around the
60s and 70s. This might be illusory, but it could be a good
place to investigate.
As far as profiling is concerned: obviously, if you're using the Sun
JDK, you can use the built-in profiler (try java -Xhprof for
usage). There's also a nice profile output analyzer called HAT
available from Sun, just for heap analysis. Here the URL:
http://java.sun.com/people/billf/heap/
I did some investigation of this stuff and I didn't see anything that
was glaringly out of whack, but I'm not really a performance tuner.
Good luck to whoever takes this on... I'm putting my money on Travis. B-)
~Mr. Bad
*...which, btw, is a lovely piece of code and HATS OFF to Oskar and
Ian et. al. for doing. Beaujolais!
**Also great stuff! Beaujolais to SGM, too!
--
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\ / Pigdog Journal | http://pigdog.org/ | *Stay*Real*Bad*
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( ((**) "If it's not bad, don't do it.
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