Lemmy instance requieres at minimun 150mb of RAM, the CPU usage is minimum. Don’t expect it to scale well to a lot of users, but it should work for a few users. More info here: https://join-lemmy.org/docs/en/administration/administration.html:
Scuba diving, I can’t describe with words how it it is… You are in a complete different world
I already had the lts kernel ignored in the pacman.conf. Haven’t updated it since several months and everything is still working fine. The only issue that I’ve found is the dkms module for virtual box that I tried to install 2 days ago and it failed.
In any case if you really want to skip the kernel upgrades maybe a distro like hyperbola will suit you best.
About the upgrades without restart, systemd is working on user space restart which in theory will allow your server to restart with the new software without even closing the established connections. I think that you can also live patch the kernel, but I’ve never tried it.
Good bot