"John D. Mitchell" wrote:
>
> >>>>> "Miloslaw" == Miloslaw Smyk <[EMAIL PROTECTED]> writes:
> [...]
> > Just a quick question: how can I calculate amount of memory that is used
> > by an object running under JVM on Linux?
>
> There is an answer for this question in the jGuru Java Language FAQ:
> http://www.jGuru.com/faq/JavaLanguage
Yeah, it says it is impossible during runtime. :)
But I meant something different, forgive me for phrasing it poorly.
I have an image synthesis app that creates hundreds of thousands of objects
at the beginning, and later it only gets worse. If I knew how much memory
I'm wasting with each object created, e.g. how heavy is full OO approach vs.
putting some stuff in tables, I'd be able to tune my app better. Currently
I've no idea if for example making all my pixels into objects is really hard
on memory. I can gather some information from "ps aux", but it's really
imprecise.
So: can anyone tell me how much memory overhead hotspot adds for each object
created under Linux JVM? If it is not constant value I'd appreciate even a
ballpark figure.
Thanks,
Milek
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