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Date:      Thu, 07 Nov 2002 10:52:21 +0100
From:      Cedric Berger <cedric@wireless-networks.com>
To:        Aditya <aditya@grot.org>
Cc:        freebsd-java@FreeBSD.ORG
Subject:   Re: preventing the JVM from swapping to disk
Message-ID:  <3DCA37D5.6010305@wireless-networks.com>
In-Reply-To: <20021107023304.GA75921@mighty.grot.org>
References:  <20021107023304.GA75921@mighty.grot.org>

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Aditya wrote:

>On a server solely dedicated to running Tomcat with the linux-jdk1.3 and 1Gig
>of RAM I'd like to prevent the JVM from ever swapping to disk. The preferred
>behaviour when it runs out of memory is for the JVM to exit (it will be
>restarted by a script). I'm allocating the JVM 700M for the min and max heap;
>less than 100M is used by FreeBSD and the rest is occupied by the JVM.
>
I don't understand your question.
Why would it swap if:
 1) You've 1GB of RAM
 2) You limit the JVM to 700M. (you can use "ulimit" to enforce that)
 3) FreeBSD uses less than 100M (including kernel buffers & co I guess)

Is FreeBSD so bad that it will swap when there is RAM available?
Cedric



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