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From Marco Castillo <mabcasti...@vdkit.net>
Subject Re: Is IBM Right About Java?
Date Tue, 08 Feb 2011 16:36:02 GMT
Dear Eric:

Nop, the GC process returns the memory to the memory pool allocated by the
JVM, so the JVM never exhaust its memory resources. The Xmx parameter indeed
indicates the maximum amount of memory from the system that the JVM can use
and the IBM assertion is true, the JVM never returns the memory allocated to
the system but don't fear, this is actually a standard design behaviour for
this kind of processes!!

Regards


Ing. Marco Antonio Castillo
Chief Design Engineer
Van Der Kaaden IT Consulting
Guatemala, Guatemala C.A.
tel: +502 22382710
mobile: +502 59186971
e-mail: mabcastillo@vdkit.net



On Tue, Feb 8, 2011 at 10:27 AM, Robinson, Eric <eric.robinson@psmnv.com>wrote:

> Saw this statement on an IBM web site:
>
> "Most JVMs grow towards the upper heap limit (-Xmx/-mx options) when
> more memory is required, and do not return memory to the operating
> system, even if the memory is no longer needed, until the JVM process
> terminates."
>
> Is this true? If thought returning unneeded memory to the OS was what GC
> is all about.
>
> --
> Eric Robinson
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