du and df don't agree
Jille Timmermans
jille at quis.cx
Mon Nov 10 08:26:07 PST 2008
Probably some file descriptor to an unlinked file is still open.
The space on disk will be freed when the last descriptor is closed.
and because there is no file linked to the data, du can't see it.
(iirc MySQL does this in some situaties when using temp-tables or
rebuilding tables)
-- Jille
Stephen Clark wrote:
> Why would du show 630k used by /tmp while df show 161M used
> by /tmp?
>
>
> # du -sh /tmp
> 630K /tmp
> # df -h
> Filesystem Size Used Avail Capacity Mounted on
> /dev/ad0s1a 94M 41M 45M 47% /
> devfs 1.0K 1.0K 0B 100% /dev
> /dev/ad0s1e 193M 161M 17M 91% /tmp
> ... remaining fs info removed
>
> # uname -a
> FreeBSD 6.1-STABLE FreeBSD 6.1-STABLE
>
> I have run fstat /tmp and can't find any files that are using
> the space that df is claiming as being used.
>
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