Catching up with performance & PostgreSQL 15

[Josh Berkus <josh@xxxxxxxxxx>]

Hey, folks:

I haven't configured a PostgreSQL server since version 11 (before that, 
I did quite a few).

What's changed in terms of performance configuration since then?  Have 
the fundamentals of shared_buffers/work_mem/max_connections changed at 
all?  Which new settings are must-tunes?

I've heard about new parallel stuff an JIT, but neither is that 
applicable to my use-case.

--
Josh Berkus