Date: Thu, 27 Jan 2005 13:50:31 +0100 From: Albert Shih <shih@math.jussieu.fr> To: Dick Davies <rasputnik@hellooperator.net> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Authentication with ldap very slow Message-ID: <20050127125031.GB22097@math.jussieu.fr> In-Reply-To: <20050126235220.GI57113@eris.tenfour> References: <20050126220336.GA23003@math.jussieu.fr> <20050126232802.GH57113@eris.tenfour> <20050126233130.GA5551@math.jussieu.fr> <20050126235220.GI57113@eris.tenfour>
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Le 26/01/2005 à 23:52:20+0000, Dick Davies a écrit
>
> make /tmp/mydir
> ls -lR that and tcpdump what i'm sending to the server
> (about a dozen lines of output)
> ls -lR /usr/local/misc (about 3Gb of mp3s owned by me) and tcpdump what i'm sending to the server
> (about a dozen lines of output)
Yes of course, that's because in this directory there no many user, maybe
root, you,.
>
> so it looks like only the one query is done by ls (i.e. it only looks up the name when it displays
> the output). How many directories are under /home? Unless we're talking hundreds, it shouldn't be
> more than a second or so delay, tops.
[root@xxxxxxxx home]# ls -l *|wc
402 3003 20127
[root@xxxxxxxx home]#
>
> It does'nt appear to caching (repeating the ls a couple of seconds later sends the
> same query), but then i don't think that accounts for your huge delays.
>
>
> It's definitely the uid lookup? Not NFS /home or something
yes because :
> (Is ls * much faster than ls -l)?
[root@xxxxxxx home]# time ls * > /dev/null
real 0m0.089s
user 0m0.000s
sys 0m0.040s
[root@xxxxxxx home]# time ls -l * >/dev/null
real 0m27.110s
user 0m0.258s
sys 0m0.727s
[root@xxxxxxx home]#
Lots of thanks.
--
Albert SHIH
Universite de Paris 7 (Denis DIDEROT)
U.F.R. de Mathematiques.
Heure local/Local time:
Thu Jan 27 13:36:46 CET 2005
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