From owner-freebsd-performance@FreeBSD.ORG Fri Sep 10 16:45:01 2004 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 4E83E16A4CE for ; Fri, 10 Sep 2004 16:45:01 +0000 (GMT) Received: from pimout1-ext.prodigy.net (pimout1-ext.prodigy.net [207.115.63.77]) by mx1.FreeBSD.org (Postfix) with ESMTP id D486143D45 for ; Fri, 10 Sep 2004 16:45:00 +0000 (GMT) (envelope-from bob@immure.com) Received: from maul.immure.com (adsl-66-136-206-1.dsl.austtx.swbell.net [66.136.206.1])i8AGisH9248160; Fri, 10 Sep 2004 12:44:55 -0400 Received: from luke.immure.com (luke.immure.com [10.1.132.3]) by maul.immure.com (8.12.11/8.12.11) with ESMTP id i8AGiqNo010009; Fri, 10 Sep 2004 11:44:52 -0500 (CDT) (envelope-from bob@immure.com) Received: from luke.immure.com (localhost [127.0.0.1]) by luke.immure.com (8.12.11/8.12.11) with ESMTP id i8AGiqx2026519; Fri, 10 Sep 2004 11:44:52 -0500 (CDT) (envelope-from bob@luke.immure.com) Received: (from bob@localhost) by luke.immure.com (8.12.11/8.12.11/Submit) id i8AGiqmZ026518; Fri, 10 Sep 2004 11:44:52 -0500 (CDT) (envelope-from bob) Date: Fri, 10 Sep 2004 11:44:52 -0500 From: Bob Willcox To: Geert Hendrickx Message-ID: <20040910164452.GE24453@luke.immure.com> References: <20040831133551.GA86660@lori.mine.nu> <4134B312.8030309@pacific.net.sg> <1093958674.680.2.camel@book> <20040831183908.GA87694@lori.mine.nu> <4141AA6A.2070802@withagen.nl> <20040910160051.GA24152@lori.mine.nu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040910160051.GA24152@lori.mine.nu> User-Agent: Mutt/1.5.6i X-immure-MailScanner-Information: Please contact the ISP for more information X-immure-MailScanner: Found to be clean X-MailScanner-From: bob@immure.com cc: freebsd-performance@freebsd.org cc: oceanare@pacific.net.sg cc: Willem Jan Withagen Subject: Re: spreading partitions over multiple drives X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Bob Willcox List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Sep 2004 16:45:01 -0000 On Fri, Sep 10, 2004 at 06:00:51PM +0200, Geert Hendrickx wrote: > On Fri, Sep 10, 2004 at 03:21:46PM +0200, Willem Jan Withagen wrote: > > I would expect a bigger system to cache just about all file access > > during 'make buildworld'. > > Even when building things with -j 64 I can not get my dual-opteron 1Gb > > system get without free pages. > > And as such most files will only be read once, and object output will be > > "slowly" synced on the disks. > > Disk I/O rearly becomes the bottleneck, most of the time I'm missing raw > > CPU cycles. > > And I have everything on 1 large 200Gb disk. > > Ok so adding more RAM may be more useful than an extra harddisk? Maybe > I could even put /tmp or /usr/obj on a RAM-disk? A fully built /usr/obj > is about 350Mb. Hmm, how to you follow the prescribed process of rebooting between the buildworld/installkernel and installworld if you put /usr/obj on a RAM disk? Following the reboot you'll have no objects to install. Bob > > GH > _______________________________________________ > freebsd-performance@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-performance > To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org" -- Bob Willcox Acquaintance, n.: bob@immure.com A person whom we know well enough to borrow from, Austin, TX but not well enough to lend to. -- Ambrose Bierce, "The Devil's Dictionary"