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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mel.connect.com.au!yarrina.connect.com.au!news.mel.aone.net.au!imci4!newsfeed.internetmci.com!in1.uu.net!csnews!coopnews.coop.net!hops.entertain.com!usenet From: dwatson@abwam.com (Darryl Watson) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Increasing cache ? Date: 8 Feb 1996 13:47:38 GMT Organization: ABWAM, Inc. Lines: 28 Message-ID: <4fcutq$rrs@hops.entertain.com> References: <823673122.24218@loddon.demon.co.uk> <4faic3$fv9@sidhe.hsc-sec.fr> NNTP-Posting-Host: ppp015.entertain.com X-Newsreader: WinVN 0.92.5 In article <4faic3$fv9@sidhe.hsc-sec.fr>, roberto@keltia.freenix.fr (Ollivier Robert) says: [snip] >You don't need a parameter on FreeBSD. FreeBSD has a unified VM/buffer >cache system where all available mmory can be used a buffer cache. > I'll say! I have BSDi 2.0 w/ patches running on my main server, which is a 486/66 EISA system w/ 32MB RAM, and a P5/100 PCI/ISA running FreeBSD 2.1.0- release w/ 16MB RAM. I ran accounting on both; on the 486/66, my accting perl script thrashed my hard drive for 4.5 hours, massaging a 2MB accouting file. On the FreeBSD system, the 2MB accounting file was read once into memory, and the disk wasn't physically accessed after that. Total run time: 20 minutes!!! I also ran the same test on a 200mz, 64MB RAM SGI WebForce Indy that came straight out of the box. Runtime: 15.75 minutes. I imagine that if the system was tuned a bit, it would significantly reduce processing time. The fact that FreeBSD has almost all the same tools as BSDi., looks like BSDi, but supports Adaptec 2940s, and is infinitely cheaper, is making us switch to FreeBSD.