Re: Which /var/ contents are disposable
On Sun, Jan 15, 2012 at 09:38:53PM +0000, T o n g wrote:
> On Thu, 12 Jan 2012 11:51:19 +0200, Andrei Popescu wrote:
>
> >> Moreover, I'll throw in /var/log as well, because I don't care about
> >> the logs either.
> >
> > You might benefit from putting it on tmpfs then ;)
>
> That brings up an interesting topic. -- No, I didn't put /var/log on
> tmpfs, but /tmp, /var/run & /var/lock instead, because I was worrying
> about wasting tmpfs with big logs, since my box might be up for months.
>
> I think staled tmpfs file might eventually be swapped out of ram to HD to
> clear up space. Is that so?
Yes. But if you write a *lot* of logfiles, this could be detrimental
to performance. OTOH, should do less frequent writes than it would to
a normal disk until it starts to flush pages out.
> Is it a good idea to put chunky /var/log on tmpfs?
Make sure you consider what will happen when it's filled to capacity.
If the tmpfs size (of all tmpfses) exceed your RAM+swap, the machine
will lock hard. So make sure you mount with an appropriate size=
parameter so the kernel won't run out of memory pages.
Regards,
Roger
--
.''`. Roger Leigh
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