Use the stat commands to check memory details and figure out where you are memory wise; every project is different and will require doing some profiling to determine where you are and how much headroom you have.
I would recommend doing some rendering tests, everytime you add more content/memory, profile your project and see the delta, etc.
Check this link out for more info on stat commands, there’s a ton of them, and using the right one for what you need will make a huge difference so you’re not working blind, if that makes sense: