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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.ececs.uc.edu!news.kei.com!news.mathworks.com!howland.erols.net!vixen.cso.uiuc.edu!news.indiana.edu!news From: Lars Hofhansl <lhofhans@indiana.edu> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: FreeBSD does interleaved paging : faster? Date: Mon, 03 Feb 1997 22:25:42 -0600 Organization: Indiana University Lines: 28 Message-ID: <32F6BA44.2DA758F0@indiana.edu> References: <JUN.97Feb4100600@goten.sinfony.ad.jp> NNTP-Posting-Host: pionier.eigenmann.indiana.edu Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01 (X11; I; Linux 2.0.28 i586) Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:35292 Junichi Kurokawa wrote: > > The subject says it all.... > > With dedicated hardwares e.g. Suns, I occasionally hear that interleaved > swap partitions improve paging performance. > > But how about the case with a ubiquitous PC MB plus *signle channel* > SCSI a la AHA2940, and FreeBSD? Is it faster? > > Your comments are welcomed, thanks! > > Regards, > junichi It's definately faster if you use seperate _disks_ (assuming all the disk are about the same speed). On an older system I had swap and /usr on different disk, which gave quite a preformance gain. Having serveral swappartitions of different disks should give some performance gain also, since it (in the best case) halfs the seektime (since the seeks can be done in parallel) as seen by the operating system (the "page latency" of course is unchanged, and the throughput may and may not by changed). Lars