From owner-freebsd-questions Wed Dec 11 4:21:46 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 78FF437B401 for ; Wed, 11 Dec 2002 04:21:45 -0800 (PST) Received: from gate21.fw.porsche.de (gate23.fw.porsche.de [193.174.9.99]) by mx1.FreeBSD.org (Postfix) with SMTP id BB4C243EC2 for ; Wed, 11 Dec 2002 04:21:35 -0800 (PST) (envelope-from perisa@porsche.de) Received: (qmail 16450 invoked from network); 11 Dec 2002 12:22:16 -0000 Received: from unknown (HELO wuxin011.ibd.porsche.de) (141.36.65.1) by 193.197.149.150 with SMTP; 11 Dec 2002 12:22:16 -0000 Received: (qmail 6621 invoked from network); 11 Dec 2002 12:12:53 -0000 Received: from beastie.ibd.porsche.de (HELO porsche.de) (141.36.3.29) by smtp4cli.ibd.porsche.de with SMTP; 11 Dec 2002 12:12:52 -0000 Message-ID: <3DF72BB6.9040700@porsche.de> Date: Wed, 11 Dec 2002 13:12:38 +0100 From: Marc Perisa User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.0.0) Gecko/20020709 X-Accept-Language: en, de-de, es-es MIME-Version: 1.0 To: irvine@sanbi.ac.za Cc: questions@freebsd.org Subject: Re: Max RAM usage References: <3DF71060.3060900@sanbi.ac.za> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Hi Irvine, Irvine Short wrote: > Hi All > > We're thinking of buying a very big Intel box for scientific computing > here. > > Anyone have any opinions as to how FreeBSD would match up to an Intel > server with over 8GB RAM and 4CPUs? The particular machine we're looking > at will go up to 24GB RAM. > > I was under the impression that any 32 bit application could not in > itself address more than 4GB of data. Is this the case? > > Cheers, > this question is frequently asked. FreeBSD on ia32 does not support more than 4 GB of memory. On Alpha it is actually only 2 GB. The general problem with ia32 and > 4 GB RAM is, that Intel designed two different implementations to address up to 36 or 32 GB. Search the mailinglist archives for more specific information. I don't know if the support for ia32 for more than 4 GB RAM will come with 5.x - but I don't think so (at least for the first releases). Someone please correct me if I'm wrong. Hope that helps Marc To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message