Matthias Apitz <guru(at)unixarea(dot)de> writes:
> I've read the doc https://www.postgresql.org/docs/13/kernel-resources.html
> but I'm still relatively clueless, what to set.
For modern PG versions on Linux, you basically shouldn't ever have to
touch those numbers. I'd only start to worry if I saw server startup
failures. These values do *not* constrain what you can set for
shared_buffers or the like; at most, they'd constrain how many PG
instances you can run on one machine.
regards, tom lane