Date: Tue, 5 Jan 2010 05:43:38 -0800 (PST) From: Dino Vliet <dino_vliet@yahoo.com> To: Greg Lewis <glewis@eyesbeyond.com> Cc: simon@olofsson.de, glewis@freebsd.org, freebsd-questions@freebsd.org Subject: Re: tweak FreeBSD 8 for optimal java/weka performance Message-ID: <682606.57767.qm@web51106.mail.re2.yahoo.com> In-Reply-To: <20100104222849.GA17741@misty.eyesbeyond.com>
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--- On Mon, 1/4/10, Greg Lewis <glewis@eyesbeyond.com> wrote: From: Greg Lewis <glewis@eyesbeyond.com> Subject: Re: tweak FreeBSD 8 for optimal java/weka performance To: "Dino Vliet" <dino_vliet@yahoo.com> Cc: freebsd-questions@freebsd.org, glewis@freebsd.org, simon@olofsson.de Date: Monday, January 4, 2010, 11:28 PM On Mon, Jan 04, 2010 at 06:54:22AM -0800, Dino Vliet wrote: > Dear freebsd people, > ? > in a few days I will install freebsd 8.0 amd64 on my 8GB RAM dual core > machine and use the system as a application server. I will install > the /usr/ports/textproc/weka toolkit, a program written in java. I > will use the diablo jdk port in /usr/ports/java. > ? > Due to the nature of the research I will be doing I will need to max > out my machine for optimal java performance. For example, I will use > the?-Xmx7g flag frequently to set?the maximun java heap size?to 7GB. > ? > Are there any other tweaks I should think of to get as much RAM for > my java programs? > Like building custom and small kernel, in order to minimize te size > of the kernel? > ? I'd recommend using openjdk6 instead of Diablo if you want to maximise performance.=A0 Diablo is getting old and isn't available natively for 8.x (its runs as a compatible binary with the compat7x port installed). IIRC there is an option to tell the JVM to use as much RAM as possible, but I don't recall it off the top of my head.=A0 There should be some docs on this on the main Java site at Sun and they will be equally relevant to FreeBSD as they are to any other OS. --=20 Greg Lewis=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Email=A0=A0= =A0: glewis@eyesbeyond.com Eyes Beyond=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0=A0=A0Web=A0 =A0= =A0=A0: http://www.eyesbeyond.com Information Technology=A0 =A0 =A0 =A0 =A0 =A0 =A0 FreeBSD : glewis@FreeBSD.= org Thanks for the advice, but isn't=A0weka depandent on=A0diablo-jdk-1.6.0.07.= 02_7, so I guess I'll have to=A0do something (change makefile to what?) bef= ore I install weka?=A0 =A0 Thanks Dino=0A=0A=0A
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