Date: Fri, 10 Sep 2004 11:44:52 -0500 From: Bob Willcox <bob@immure.com> To: Geert Hendrickx <geert.hendrickx@ua.ac.be> Cc: Willem Jan Withagen <wjw@withagen.nl> Subject: Re: spreading partitions over multiple drives Message-ID: <20040910164452.GE24453@luke.immure.com> In-Reply-To: <20040910160051.GA24152@lori.mine.nu> 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>
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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"
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