I obviously can't fix the physical memory on your PC - if you have problems with that, go in a computer shop and buy some more. But I suppose you meant virtual memory.

Engine updates normally consume the same or less memory, not more. If it's different with a particular project of yours, check by what element it's caused. The [F11] panel helps you in that. Please post again when you know some details about which object consumes more memory and under which circumstances.