Am 07.02.19 um 18:43 schrieb Nico Callewaert: > Hi, > > I'm about to start porting a Firebird DB to Postgres. Next thing will > be upgrading all customers. Most of our customers have around 30 users > or less. We have a few 'bigger' customers that maybe have 50 users or > a bit more still. The application is a Delphi application that is in > fact a 'fat' client that uses a permanent connection to the DB. I've > read that Postgres uses 1 process per user. So that means 30-50 > processes at the same time. > > I have 2 questions about this > - I guess this situation is not really a heavy workload? Or is it?
not really, assuming not all connections are active the same time.
> - And is it correct that a single process cannot access multiple CPU > cores, so things are not multi threaded? I guess MySQL used that > argument somewhere, but I'm not sure, forgive me if I'm mistaken.
yes and no, since 9.6 we can use multiple cores for one query, using multiple processes.
> > The whole thing boils down to this question: Am I save with 30-50 > simultanous users for speed and scaling? >