*BSD News Article 62758


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Newsgroups: comp.unix.bsd.freebsd.misc
Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!newshost.telstra.net!act.news.telstra.net!psgrain!iafrica.com!pipex-sa.net!plug.news.pipex.net!pipex!weld.news.pipex.net!pipex!tank.news.pipex.net!pipex!newsfeed.internetmci.com!in1.uu.net!twwells!bill
From: bill@twwells.com (T. William Wells)
Subject: Re: Poor performance with INN and FreeBSD.
Organization: None, Mt. Laurel, NJ
Message-ID: <DnqyIL.H0E@twwells.com>
References: <311F8C62.4BC4@pluto.njcc.com> <4gqvs8$7u@uriah.heep.sax.de> <DnFM1F.4FG@twwells.com> <4ha75a$af@uriah.heep.sax.de>
Date: Mon, 4 Mar 1996 14:20:44 GMT
Lines: 19

In article <4ha75a$af@uriah.heep.sax.de>,
J Wunsch <joerg_wunsch@uriah.heep.sax.de> wrote:
: bill@twwells.com (T. William Wells) writes:
:
: > : ``large'' overhead is certainly an overstatement, unless you're going
: > : to put your news server on a 386sx/16.
: >
: > I measured the amount of time spent in a regular NNTP feed spent
: > in namei. It's 69% of the time needed to process an article.
:
: Wall clock or CPU time?

Wall clock. Specifically, in ktrace output, from the namei call to
the next event, vs. the time between select calls which contain
namei calls.

I am not even slightly surprised at this result; as I said in my
earlier message, each namei call reads on average 44K of data and
little of it is cached.