So with the discussion about moving to zram for swap on Fedora I wondered
if it was worth taking a look at for my CentOS 8 machine.
I noticed that there was a build in Koji but it was deleted. Figuring there
was a reason but as yet undeterred I checked out master and built an el8
Installed on my CentOS 8 machine and tried to start it up... Definitely
Figured out that it didn't like the command that created the zram
(zramctl). Turns out that (and this is a guess), that the kernel in CentOS
doesn't support lz4 compression. In fact none of the compression options
worked except "deflate". Not sure what the compression ratio is for it but
I now have zram using it.
Second problem is that the configuration options in /etc/zram.conf seemed
to be ignored. Even though I specified a factor of 2 for the amount of ram
to use, it kept using the default in the systemd script of 3. So I just
changed the script and hardcoded it to 2048MB. Since I have no plans in
changing the amount of memory in that computer it really doesn't matter.
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