Do you plan on adding a server-side database caching, to avoid rampant IO cycles?
Also, is quite easy for a UE4 server to eat beyond a 1GB ram from the server, a single process when the game client is significantly big enough (the dedicated loads in memory many of the client-side assets);
Do you have any strategy to mitigate that? I, mean, the more RAM a server eats the more expensive your metal will be monthly…