Date: Thu, 08 Sep 2005 13:52:33 +0200 From: "O. Hartmann" <ohartman@mail.uni-mainz.de> To: NAKATA Maho <chat95@mac.com> Cc: freebsd-amd64@freebsd.org, kris@obsecurity.org Subject: Re: Which SCHED_ for DB server Message-ID: <43202601.5010505@mail.uni-mainz.de> In-Reply-To: <20050907.124050.21851139.chat95@mac.com> References: <4316A5BC.1000405@meijome.net> <b41c7552050901015317d5942e@mail.gmail.com> <20050906000016.GA91835@xor.obsecurity.org> <20050907.124050.21851139.chat95@mac.com>
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Hello. That sounds weird. Do you have results for FreeBSD 6.0? Oliver NAKATA Maho wrote: > In Message-ID: <20050906000016.GA91835@xor.obsecurity.org> > Kris Kennaway <kris@obsecurity.org> wrote: > > >>On Thu, Sep 01, 2005 at 10:53:39AM +0200, Claus Guttesen wrote: >> >>>>I'm building a server that will run PostgreSQL with a database >>>>containing several 10s of million records. The only things happening on >>>>this box will be the SQL processes and other processes to parse raw data >>>>and load into the DB. Users = a few connections via HTTP from an >>>>intranet server (not more than 5 concurrently). >>>> >>>>I was wondering what is the best SCHED_ to set in the kernel. >>>>I currently have SCHED_4BSD but was wondering if _ULE would be better >>>>for this >>> >>>For prod. use I would recommend SCHED_4BSD atm. The 4BSD-scheduler >>>does seem to be more stable on SMP and up. >> >>ULE might be OK on SMP with 6.0 and above, but performance seems to be >>a bit lower than 4BSD in my tests. Try it yourself and see which is >>better. > > > I tried different matter, but my result shows: > for 5.4-RELEASE, ule is 1.5 times slower than 4bsd. > See also PR: 85820 for details. > > thanks! > -- NAKATA, Maho (maho@FreeBSD.org) > _______________________________________________ > freebsd-amd64@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 > To unsubscribe, send any mail to "freebsd-amd64-unsubscribe@freebsd.org"
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