On 09/29/17 18:05, Richard L. Hamilton wrote:
On Sep 29, 2017, at 11:41, Alan Coopersmith <alan.coopersm...@oracle.com> wrote:
On 09/29/17 06:55 AM, Predrag Zečević - Technical Support Analyst wrote:
Hi all,
I got today alert (actually blinking TimeSlider icon) that root FS is more than
70% in use (that is my setup).
Went to check what occupies so much space, and found:
$ pfexec du -sch /*
...
76G /proc
/proc is a virtual file system of its own and doesn't use space in your ZFS
pool, so you'll need to look somewhere else to find out what's filling your
root FS.
-alan-
Not only that, but du on /proc is probably misleading. pmap -x PID (for
one or more actual PIDs) will probably be more informative. Keep in mind that
shared mappings may appear in many processes, but only consume memory once.
As for real storage, my favorite du commands are either
du -doh / | gsort -k1hbr
or
gdu -xSh / | gsort -k1hbr
which do not cross filesystem boundaries, do not include subdirectory totals in
a directory's total, and present totals in easier to read scaled units; gsort
is also able to sort on scaled units. This allows spotting the directories
that contain directly within them the largest file space totals.
The only thing that doesn't do, is it does not report files that are open but
deleted (which will disappear when nothing holds them open any more). Any way
to find those is going to be rather devious, and beyond what I'd mention here.
One possibility won't be reported by any tool, not even by inspecting
/proc/*/fd/* or /proc/*/object/*, and that's if some ignorant person has
deleted the currently in-use process accounting file, usually /var/adm/pacct,
which is held open not by any process (so no reference will appear in /proc or
would be found even if one built a working version of lsof), but by the kernel
itself; the fact of that can only be discovered by someone knowledgeable enough
to do so using a debugger on the running kernel.
Indeed, both examples from above were found abandoned log file...
Many thanks for that useful set of commands.
With best regards.
Predrag Zečević
--
Predrag Zečević
Technical Support Analyst
2e Systems GmbH
tel: +49 - 6196 - 95058 - 15
mob: +49 - 174 - 3109288
fax: +49 - 6196 - 95058 - 94
e-mail: predrag.zece...@2e-systems.com
headquarter: 2e Systems GmbH, Koenigsteiner Str. 87, 65812 Bad Soden am
Taunus, Germany
registration: Amtsgericht Koenigstein (Germany), HRB 7303
managing director: Phil Douglas
http://www.2e-systems.com/ - Making your business fly!
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