On Tue, 2020-06-09 at 09:04 -0600, Chris Murphy wrote: > On Mon, Jun 8, 2020 at 4:54 PM Konstantin Kharlamov < > hi-angel@xxxxxxxxx> wrote: > > > So, I am testing ZRAM right now (as per your advice in another > > thread). All well > > so far, however reading this makes me think I gonna stumble upon a > > point where > > ZSRAM will be a better fit. > > > > You see, the idea of ZRAM and ZSWAP is improving low-memory > > situation. This is > > especially relevant for small amount of RAM, like your Raspberry > > example. > > > > In such situation if you, for example, open a lot of tabs in a > > browser, you may > > easily get to a point where even ZRAM is exhausted. Now, had you > > additionally a > > SWAP device, it would be no problem, the data would simply spill > > over to SWAP. > > > > Yes, SWAP is slow (well, it is on HDD at least). But consider this: > > in this > > workload , you most likely not gonna touch older of browser tabs > > for quite some > > time, so the slowness won't hurt you. > > SD Cards are pretty slow in Pi's. And also they have much more > limited > wear endurance than laptop SSDs. So in this use case for sure, memory > based swap only is idea. If it's not enough, then I think I've > reached > the physical limits of the configuration. But how to make this more > dynamic and smarter is certainly an area worth exploration, including > the idea of creating swapfiles on demand. But that is beyond the > scope > of this feature change. > > > > Now, I love the idea of using either ZRAM or ZSWAP. But to consider > > which one of > > them do we want, I think we would need to discuss first: do we > > really want to get > > rid of disk swap? Hibernation being discussed somewhere in this > > thread is another > > point. I personally don't like idea of removing disk swap. > > It is worth continuing the discussion. But for non-hibernation and > incidental swap, taking up more than 4G of swap seems excessive and > only leads to slow systems that will never OOM until all of the swap > partition is full. Btw, how about a compromise: we could use ZRAM for installations without SWAP partition and ZSRAM in case user decided to add a SWAP partition? _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
