5GB of RAM is allocated in minecraft, and in the F3 menu always hover around 25-50% at all times.
When I open up my sp world, the memory usage is increasing at a rate of 70MB per second, then it plateau at about 25GB (since PC is 32GB RAM). The ingame F3 still says only 25-50% of ram used. Even when i exit my world, memory is still increasing. World generation is off.
Testing in multiplayer, memory usage still increasing at a steady rate of about 10MB per second, it also exceeds my allocated RAM after a period of time.
Memory around 3-4GB for hours when DH is disabled.