From owner-freebsd-hardware@FreeBSD.ORG Thu Aug 30 09:52:34 2007 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0B96816A473 for ; Thu, 30 Aug 2007 09:52:34 +0000 (UTC) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (ns1.ecoms.com [207.44.130.137]) by mx1.freebsd.org (Postfix) with ESMTP id D7A8613C45D for ; Thu, 30 Aug 2007 09:52:33 +0000 (UTC) (envelope-from mv@thebeastie.org) Received: from p4.roq.com (localhost.roq.com [127.0.0.1]) by p4.roq.com (Postfix) with ESMTP id 84ED14CE88 for ; Thu, 30 Aug 2007 08:59:16 +0000 (GMT) Received: from smitch7.jumbuck.com (p82.jumbuck.com [206.112.99.82]) by p4.roq.com (Postfix) with ESMTP id 5E67A4CE81 for ; Thu, 30 Aug 2007 08:59:16 +0000 (GMT) Received: from smitch7.jumbuck.com (mail.jumbuck.com [206.112.99.82]) by smitch7.jumbuck.com (Postfix) with ESMTP id B3141412C33; Thu, 30 Aug 2007 08:58:19 +0000 (UTC) Received: from beaste5.jumbuck.com (ppp198-18.static.internode.on.net [59.167.198.18]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by smitch7.jumbuck.com (Postfix) with ESMTP id 65A18412C32; Thu, 30 Aug 2007 08:58:19 +0000 (UTC) Received: from beaste5.jumbuck.com (beast5 [192.168.46.105]) by beaste5.jumbuck.com (Postfix) with ESMTP id 4A294209D285; Thu, 30 Aug 2007 18:58:17 +1000 (EST) Received: from [192.168.46.102] (unknown [192.168.46.102]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by beaste5.jumbuck.com (Postfix) with ESMTP id 06EC9209D1CD; Thu, 30 Aug 2007 18:58:17 +1000 (EST) Message-ID: <46D686A8.1090201@thebeastie.org> Date: Thu, 30 Aug 2007 18:58:16 +1000 From: Michael Vince User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.8.1.4) Gecko/20070604 SeaMonkey/1.1.2 MIME-Version: 1.0 To: err References: <20070829174236.6c33ccfc@n2.lands.raad> In-Reply-To: <20070829174236.6c33ccfc@n2.lands.raad> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP Cc: freebsd-hardware@freebsd.org Subject: Re: 8GB RAM: PAE or not PAE? X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Aug 2007 09:52:34 -0000 err wrote: > Hi > > I have an HP DL380 quad core with 8GB of RAM and SAS disks in RAID, with freebsd 6 STABLE on it. > > Everything works fine, except for the RAM addressing problem: freebsd sees only 4GB. > I know it have been discussed, but it could be a problem to me for running a 64bit compiled system; what is the stability of a kernel compiled with the PAE option? > > I've a kernel with no modules, and before trying PAE I would know for other people experiences... > In particular I'm interested in the behavior of ciss, bce, em and usb stuff, and application like Perl, Ruby, PHP 5, MySQL server, heavy MAWK and bzip2 load. > > Also, if I boot a PAE kernel, in order to have all my RAM available, I have to set the hw.physmem variable to 8G ? > > Thanks > -- > Emmanuel Richiardone > I have 2 PAE servers under my control and they work fine one is a Dell 2850, PAE is a little be extra work compared to most FreeBSD setups though but if its working on the hardware you need you should be home. The only reason I used PAE over a AMD64 kernel is because I needed to run stuff that wasn't available on 64 bit, such as Oracle drivers for Perl scripts etc. If I didn't have these needs I would prefer to run AMD64. Mike