On Monday 19 March 2018 20:40:00 Nick Koretsky wrote:

> > > Well, i mean does reboot reclaim that lost space? You see one of a
> > > possible reason for a "vanished" space are open deleted files. If some
> > > daemon misbehave with cache or imporper log rotations, etc...
> >
> > It does reclaim some of the lost space, yes - hence one reason for
> > rebooting, when I run out of space - but there is still a creeping issue
> > of space disappearing in increments of a couple mb at a time.
>
> Well, than you have two different issues at hand. Two deal with a space
> that is reclaimed by reboot, run (when some space already gone)
>   lsof -nP +L1
> and look for anything suspicious here. 
All entries are marked as deleted. I could give you the whole list, but it is 
very long, and besides I am trying not to give out my user name, and other 
specific details. Anything I ought to look for, if all items are already 
marked as deleted? 

> Also, if /tmp is on real disk (not 
> tmpfs), it is also a primal suspect for a space that is reclaimed by
> reboot.
>
I did look in /tmp, but there is nothing much there; although the presence of 
a systemd entry does bother me - but maybe this is by design. 

> For an issue with a long term lost space, the only thing i cab suggest it
> to setup a cron to run something like
>  du -xcbd2 / > $(date +\%j%H)

Running the cron job now. 

Bill