Re: Fedora 33 System-Wide Change proposal: swap on zram

[Kamil Paral <kparal@xxxxxxxxxx>]

On Thu, Jun 4, 2020 at 10:32 PM Ben Cotton <bcotton@xxxxxxxxxx> wrote:

https://fedoraproject.org/wiki/Changes/SwapOnZRAM

== Summary ==

Swap is useful, except when it's slow. zram is a RAM drive that uses
compression. Create a swap-on-zram during start-up. And no longer use
swap partitions by default.

I haven't tested it personally on my system yet, but I've read the proposal carefully (it's very well described, thank you!) and it sounds like a good change, so thumbs up at the moment. This might offer much better system interactivity under heavy RAM workloads compared to alternative OSes which don't use RAM compression (e.g. Windows). I like that. If /dev/zram0 really dynamically scales up and down and occupies no real memory when swap is not used, I can't see any disadvantages there. The only thing is that it will prevent using hibernation by default, but that's a whole different topic that is dealt with separately and I understand it's sadly a very broken feature at the moment anyway.

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