Date: Thu, 7 Nov 2002 11:28:00 +0000 (GMT) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: Erwan Arzur <erwan@netvalue.com> Cc: Aditya <aditya@grot.org>, freebsd-java <freebsd-java@freebsd.org> Subject: Re: preventing the JVM from swapping to disk Message-ID: <Pine.GSO.4.44.0211071127320.19310-100000@mail.ilrt.bris.ac.uk> In-Reply-To: <3DCA3A2A.7030904@netvalue.com>
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On Thu, 7 Nov 2002, Erwan Arzur wrote: > 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. > > > > One piece of advice before blindly set -Xmx700m -Xms700m, make sure you > read this article : > http://www.javaworld.com/javaworld/jw-01-2002/jw-0111-hotspotgc_p.html > and all assorted references at the end of it. > > I really think FreeBSD VM subsystem requires you to allocate swap space. > I guess you'll get suboptimal performance results by simply disabling it. > > don't forget your dear google friend ;-) Or ask Matt Dillon; BSD copes perfectly well without swap. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/ "...er, that's my _spare_ axe." - Gimli in the Council of Elrond, FotR. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-java" in the body of the message
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