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Subject: RE: Handling huge amount data
Date: Tue, 29 Aug 2006 17:28:50 +0100
Message-ID: <DDBBD1E00935D144AB9563D57EF98D622F7EC9@raccoon.melandra.net>
Thread-Topic: Handling huge amount data
thread-index: AcbLhQ4r384aZ8teSi+KiHprFweikAAAroqQ
From: "Peter Crowther" <Peter.Crowther@melandra.com>
To: "Tomcat Users List" <users@tomcat.apache.org>

> From: Robert Harper [mailto:robert@iat-cti.com]=20
> I've seen the memory rise and fall so if the GC releases=20
> memory, it should be returned to the OS.

... at some point, assuming the GC is capable of compacting the heap to
give an entirely free block of memory that can be returned to the OS,
and assuming that (in Windows) the OS is under memory pressure and is
requesting processes to free what memory they can.

I have to say I've never observed a JVM returning memory to the OS, even
under quite severe OS memory pressure.  Equally I may not have been
looking when it did!

		- Peter

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