Performance without caching (logged in members) – do I need a super server?

Hi,

I start with a more generic request, as I spent already so many days experimenting (without success).

I managed to create a website with members area that is quite fast in the frontend (because of good caching).

However, the usual performance issues when members log in. The site is not live, there are no resources used from other members. But even if I log in in the frontend, it is just very slow.

Before I go into details, I ask myself if there are special requirements on the server or hosting to run Ultimate Member?

The question is if it is even realistic to run it on a 1GB, 1 Core Cloudways DigitalOcean server.

I want to avoid more and more experiments, should it anyway require an 8GB server.

Other than that … all possible resources to improve performance for logged in users are highly appreciated. I feel I tried already everything (I know very generic)

Thanks so much for some information

best regards
Markus