Oversized auxiliary file systems in Dapper; why?
daniel at rimspace.net
Wed Dec 6 10:16:56 UTC 2006
Urtzi Jauregi <urtzi at fmf.uni-lj.si> writes:
> Hello everybody,
> When I want to check the available space on my hard disk, I get the
> urtzi at escher:~$ df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/hda1 5.0G 3.5G 1.3G 74% /
> varrun 248M 88K 248M 1% /var/run
> varlock 248M 4.0K 248M 1% /var/lock
> udev 248M 140K 248M 1% /dev
> devshm 248M 0 248M 0% /dev/shm
> I am quite surprised by the four 248-MB filesystems. I have checked
> quite often, and these filsystems are never more than 1% full.
> How can I tweak the system to remove or make them smaller (I mean,
> does udev need 250 MB to work at all?)? Do I actually need all of
Yes, you need them, and you should just leave them alone, because...
> If it has to be like that, I'd like to know how do I get in exchange
> for losing a whole GB of disk space! ;-)
...you have not lost anything at all.
Those are all memory and swap backed file systems, used to hold data
that is useless after a reboot. The "size" is the maximum memory that
can be allocated on them, and they really only use the memory they show
So, in this case you have around 229K of memory (and/or swap) used to
provide these scratch areas and system management tools.
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