I was going to suggest RethinkDB, I've used it for tons of projects, and it's my current first go to DB. Combines the flexibility of a document store, with rela

I was going to suggest RethinkDB, I've used it for tons of projects, and it's my current first go to DB. Combines the flexibility of a document store, with relational queries on them. Pretty awesome. Are the memory requirements that much more than having tens of thousands of tables open?