Is there a way my SSH server, and everything under it (including bash) can be always available under heavy load ?
Maybe it could be some kind of a critical path, all in memory, with a dedicated CPU or something like that.
What is the way I could have an always-available server at minimal cost, to investigate what's going on on my server ?
sshd
so it takes priority. As for protecting a limited set of file descriptors, PIDs and socket: cgroups (probably) has the answer. Google shows plenty of results. – Ken Sharp Aug 02 '18 at 03:21