Disc Free (df) weirdness (FC2)

[Craig White]

On Thu, 2005-10-06 at 22:12 -0500, Mike McCarty wrote:
> Craig White wrote:
> > On Thu, 2005-10-06 at 20:10 -0500, Mike McCarty wrote:
> > 
> >>Today, I looked at my disc free space, after deleting some files.
> >>I found that, after deleting approx. 28M of files, that df reported
> >>the disc as being 93% full. Well, the last time I tried looking,
> >>it was 85% full, just a couple of days ago. I have created a couple
> >>of text files, and read some e-mail. But why was my disc 8% more
> >>full than before?
> >>
> >>I searched and searched for where the space was hiding, and could
> >>not find it. I was comparing with the output from the earlier
> >>du -s /some/path/* | sort -gr | head, and couldn't find it.
> >>
> >>I did some sync commands, and tried again, and it just looked
> >>like things should be smaller.
> >>
> >>Eventually, I rebooted. Now du thinks that my disc is 84% full.
> >>
> >>I don't automatically delete /tmp, and it only has 136M in it,
> >>anyway.
> >>
> >>$ df
> >>Filesystem           1K-blocks      Used Available Use% Mounted on
> >>/dev/hda5              7633264   6081748   1163768  84% /
> >>/dev/hda3                99075     24602     69358  27% /boot
> >>none                    124044         0    124044   0% /dev/shm
> >>
> >>At 93%, it must have been about 7098935 blocks used. How did a
> >>reboot free up 1017187 blocks?
> >>
> >>$ du --version
> >>du (coreutils) 5.2.1
> >>$ uname -a
> >>Linux Presario-1 2.6.10-1.771_FC2 #1 Mon Mar 28 00:50:14 EST 2005 i686 
> >>i686 i386 GNU/Linux
> > 
> > ----
> > since basically everything is in /dev/hda5 I would venture to guess that
> > you have a lot of space tied up in /var that you aren't considering
> > how/when things go there.
> > 
> > du -sh /var/log
> > du -sh /var/cache/yum
> > 
> > Don't know what you are doing with this system and you may be able to
> > make space by doing things like 'yum clean all' or removing the log
> > rotations #'d .1 .2 .3 .4 in /var/log which can grow really large if you
> > are logging firewall stuff on a cable modem connection. Also, if you
> > crank up the log level on some stuff (ldap or samba come immediately to
> > mind - like samba log level 10) can really log a ton of stuff in very
> > little time.
> 
> Umm, I had done du before, and all directories showed to be the same
> size as before. I used
> 
> $ ls /
> bin   dev  home    lib         misc  opt   root  selinux  tftpboot  usr
> boot  etc  initrd  lost+found  mnt   proc  sbin  sys      tmp       var
> 
> du -s /bin /boot /etc /home /lib /misc /opt /root /sbin /selinux /sys \
>    /tmp /usr /var | sort -gr >> du.out
> 
> Sizes two days ago:
> 
> 3629612 /usr
> 1543788 /home
> 456448  /lib
> 383804  /var
> 256283  /proc
> 61600   /etc
> 48528   /tmp
> 20488   /boot
> 11884   /sbin
> 5040    /bin
> (don't have less than this saved)
> 
> 
> Sizes today
> 
> 3629612 /usr
> 1501496 /home
> 456448  /lib
> 382648  /var
> 61600   /etc
> 11884   /sbin
> 5040    /bin
> 1456    /root
> 572     /dev
> 136     /tmp
> 4       /selinux
> 4       /opt
> 4       /misc
> 0       /sys
----
reboot cleaned out /tmp

Craig


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