Hi,
This topic has been discussed a couple times on devel@ over the past year - related to resource control, and better interactivity in low memory situations. And now I have a preview of the change proposal ready.
https://fedoraproject.org/wiki/Changes/SwapOnZRAM
The proposal aims for default partitioning, for all Fedora editions and spins, to not create a swap-on-disk partition. And instead create a compression-based RAM disk, called ZRAM, and use that for swap.
Previous conversations with cloud and server folks suggests it's somewhat common to not have swap at all. Hopefully I can change your minds. :D Fast swap is good.
I'm confident a one-size-fits all size for the ZRAM device is possible, as a fraction of RAM, with a max size (cap). This should be aggressive enough for low memory devices, while also not expending as much overhead for the systems with a lot of memory. It might be an option to ship different configurations, if necessary.
There is a test day planned. But I'd like to get solid buy-in from cloud and server folks before then.
Thanks,
-
Chris Murphy