Re: /tmp running out of space

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Michael A. Peters wrote:
Anne Wilson wrote:
On Sunday 07 January 2007 11:33, Steve Searle wrote:
Around 11:20am on Sunday, January 07, 2007 (UK time), Anne Wilson scrawled:
On Sunday 07 January 2007 11:03, Ed Greshko wrote:
Anne Wilson wrote:
/tmp is filling up rapidly.  I'm guessing that it would be safe
enough to delete everything dated previous to the last bootup.  Am I
right?
The most logical question is, what is /tmp filling up with?  I can't
say that in a normally operating system I've seen /tmp filling up
"rapidly" without a cause and I'm not the one to go willy-nilly
deleting things without known why they are being created.
Duh! I mis-read the logfile line.  It's not really filling up, though
there are things that I think should be deleted.
Anne,

I run the following command in a cron job:

    tmpwatch --mtime --verbose --verbose 168 /tmp

You may not want the --verbose, and check the manpage for the --mtime
option, but basically this deletes all files in /tmp that have not been
modified for 168 hours or more.

I have a problem, Steve. Running that command from a root konsole works fine, so I set it to run as a cron job every Wednesday. Now I find that from both boxes where I set this up I'm getting root emails that say

/bin/sh: tmpwatch: command not found

What could be wonrg?

tmpwatch is /usr/sbin/tmpwatch. Is /usr/sbin in your path in the cronjob?


Anne


I personally prefer to use tmpfs

in /etc/fstab :

tmpfs   /tmp    tmpfs   nosuid,noexec,size=256m,mode=1777 0 0

That way /tmp does not use any physical disk space - and is wiped every time I reboot.

size=256m is optional - w/o it though, it can use up to half of your physical ram. A 256m /tmp is more than plenty.

The only drawback - if you download files larger than the available space in the /tmp filesystem via firefox - the download will fail because firefox assembles it in /tmp. You can change that in Firefox preferences - but I prefer to grab large files via wget rather than firefox download manager.

With a 256 MB /tmp - I rarely use more than 1% of it.
With /tmp in memory - the disk arm doesn't have to move to write/read temp files, they are read out of memory.



--
Joachim Backes <joachim.backes@xxxxxxxxxxxxxx>
University of Kaiserslautern,Computer Center [RHRK],
Systems and Operations, High Performance Computing,
D-67653 Kaiserslautern, PO Box 3049, Germany
--------------------------------------------------
Phone: +49-631-205-2438, FAX: +49-631-205-3056

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