Date: Sun, 30 Dec 2001 22:55:12 +1100 From: Joshua Goodall <joshua@roughtrade.net> To: sothat <sothat@bsd.ee.ntu.edu.tw> Cc: freebsd-questions@freebsd.org Subject: Re: du and df not consistency ? Message-ID: <20011230115512.GB70217@roughtrade.net> In-Reply-To: <20011230030524.GA32059@bsd.ee.ntu.edu.tw> References: <20011230030524.GA32059@bsd.ee.ntu.edu.tw>
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On Sun, Dec 30, 2001 at 11:05:24AM +0800, sothat wrote:
> why the df output and du got the different result ?
> ( I've sync many times :)
This is typically when a process has a file open on disk that has
been unlinked (rm'd). The file will continue to eat space until it
is closed. Typically this is visible when syslogd has been busy.
Try reloading your syslogd (kill -HUP `cat /var/run/syslog.pid`).
If that fixes it, there's your answer: open but unlinked logfiles.
Failing that there are three other techniques
a) "nuke" ; reboot the machine
b) "shotgun" ; restarting as many daemon processes as possible
c) "needle in a haystack" ; use fstat and/or lsof to go through
the list of open files to find unexpected writers.
... in descending order of decisiveness and brutality, and
in ascending order of finesse and learning.
Regards
Joshua
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