zRam and Swapspace

[Tom H]

On Sat, May 18, 2013 at 11:31 AM, Liam Proven <lproven at gmail.com> wrote:
>
> So, just for the experiment, I tried configuring a 1GB RAM VM with
> both zRam (compressed swap in RAM) and swapspace (on-demand swapfiles
> in /var so you don't need a swap partition).
>
> It seemed to work fine. I loaded Firefox with a ton of image tabs,
> plus LibreOffice, the GIMP, VLC, Evince, System Monitor and watched
> the swap gradually climb until zRam's half a gig of "virtual" virtual
> memory (IYSWIM) was exhausted, at which point it started creating
> swapfiles - one of 216MB followed by one of 270MB.
>
> System performance gradually degraded, as you might expect. Eventually
> System Monitor froze up and then Firefox, but I suspect that if I had
> given them long enough, they'd have recovered as they were swapped
> back in.
>
> The only snag: trying to hibernate, it did it happily, but when the VM
> rebooted, I got a cold-boot rather than a recovery from hibernation.
>
> But if you don't want hibernation - and I don't, not on desktops -
> then the combination seems to work well for slightly low-memory
> machines.
>
> I'd say that if you don't want or need hibernation support, there
> doesn't seem to be much need for a dedicated swap partition any more.

Thanks.

Does hibernation work with swapspace but without sram?