Phantom /var full messages
Sergey Zaharchenko
doublef at tele-kom.ru
Fri Sep 10 08:43:10 PDT 2004
On Fri, Sep 10, 2004 at 11:23:11AM -0400,
Jerry McAllister probably wrote:
>
> No, you are running out of space! DF has nothing to do with it.
>
> If one of the processes grabs some file space and then unlinks, it
> is still holding/using that space and probably needs it, even if
> one method (df) shows it used and another (du) does not. Don't be
> fooled by the red herring of du and df disagreeing. Some process is
> trying to use that space and you need more of it.
>
Correct. du can only show the `named' space (the size of files which are
not unlinked-but-open).
One of the ways to find out what has the largest files open is
# fstat | grep /var | sort -r -n -k 8 | head
(gives you the `top ten list' of the largest open files and the
processes which use them).
If the problem is in a program holding lots of small files open, then a
different script (utilizing uniq -c) could be devised.
> If you are doing database stuff, then I can't imagine having a /var
> of less than a few GB, unless you move a lot of stuff out of /var and
> create links. See some recent previous posts on the subject.
31GB is `a few GB' in some sense.
>
> ////jerry
>
> >
> > Paul Schmehl (pauls at utdallas.edu)
> > Adjunct Information Security Officer
> > The University of Texas at Dallas
> > AVIEN Founding Member
> > http://www.utdallas.edu
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--
DoubleF
Madam, there's no such thing as a tough child -- if you parboil them
first for seven hours, they always come out tender.
-- W. C. Fields
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