On Wed, Aug 26, 2020 at 6:02 PM Ed Greshko <ed.gres...@greshko.com> wrote: > > On 2020-08-27 06:28, Chris Murphy wrote: > >>> We are considering bumping the default size for swaponzram. So (b) is > >>> helpful to see if there are any negative side effects long term. I > >>> never saw any, but I am not a sufficient sample size. > >>> > >>> Once the installation is finished, you can copy that same .conf file > >>> to /mnt/sysimage/etc/systemd/ in the installation environment, so it > >>> takes effect upon reboot. > >> I'll do this soon. It may be delayed a day or so due to previous > >> commitments. Is that OK? > > Yeah no hurry. > > > > My morning unexpectedly opened up. > > Doing the above allowed the installation to complete with 1248mb of memory > assigned to the VM. > The system booted and is running fine. > > [egreshko@localhost ~]$ zramctl > NAME ALGORITHM DISKSIZE DATA COMPR TOTAL STREAMS MOUNTPOINT > /dev/zram0 lzo-rle 1.2G 510.6M 159.7M 167.6M 1 [SWAP]
Effective compression ratio is 3:1. Also, that's at the low end of what I regularly see. High end 4:1. If we had more data, 1:1 might be the safer and more conservative option. Thing is, I don't know that. I can't prove it. But there's a lot of historical data suggesting swap should be 50% of RAM. It only became common to use 100% and higher, to support the hibernation use case. A compromise for F33 that has already been suggested, and is compelling, is bump the ratio to 75%. And the cap from 4G to 6G. We have so many use cases we don't know a ton about, on a variety of archs, is the main reluctance. Things have been going extremely smoothly so far. But if we were to change it, a Beta FE might be a good time to do it, so the new values are in beta. Because we could then back off for final. cc: Zbigniew and Alexey for opinions. -- Chris Murphy _______________________________________________ test mailing list -- test@lists.fedoraproject.org To unsubscribe send an email to test-le...@lists.fedoraproject.org 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/test@lists.fedoraproject.org
