[HEADS-UP] Rawhide: /tmp is now on tmpfs

[Richard W.M. Jones]

On Fri, Jun 01, 2012 at 11:05:26AM -0400, Gregory Maxwell wrote:
> On Fri, Jun 1, 2012 at 9:50 AM, Gerry Reno <greno at verizon.net> wrote:
> > So everyone needs to go out and buy twice as much RAM so F18+ can run /tmp as tmpfs without causing memory shortfalls
> > for everything else they do.
> > That's crazy.
> 
> Thats not true (and I've used tmpfs for tmp for years, so I'm speaking
> from experience)— tmpfs is backed by swap on demand. Just add the
> space that you would have used for /tmp to your swap.

The *default* limit for tmpfs is half of physical RAM (swap is not
counted).  So *if* tmp-on-tmpfs is left at the defaults then
increasing physical RAM might be necessary.  I haven't bothered to
look at how tmp-on-tmpfs is implemented in systemd though.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top