cm0002Debunking zswap and zram myths
Lemmchen
BjörnMore or less.
- Zswap is better than zram because it’s integrated with the kernel. Swap in zram is more of a hack.
- zram can kill your file cache unnecessarily, which leads to more disk reads.
- Don’t use zram without an oom killer.
- They’re working on zswap to not require any disk swap at all, basically killing the last reason why one might want to use zram over zswap.
If this is accurate, why does Fedora use zram by default?
fedoraproject.org/wiki/Changes/SwapOnZRAM
Seems like the author has some legitimate credentials, and I have explicitly noticed the OOM on Fedora SilverBlue when processing shaders in Steam (possible memory leak in Baldurs Gate 3, but still a hard crash when OOM).
He addresses that later under the title “zram on Fedora”.
Basically because Fedora wants to eliminate disk swap entirely. They have systemd-oomd configured to mitigate the downsides.
Cris_CitrusI… I think that might not be working on my install… I keep getting out of memory crashes that hang my laptop and I’m not really technical enough to solve it so I’ve just been living with it until I reinstall and try to set everything back up, or distro hop again
I wonder if I configured something wrong at install or broke it at some point tinkering…
Khleedril