I've been playing 1.15 and have been noticing that DayZ always uses up all of the available memory. The amount of time needed to use all the memory seems variable. Possibly happens more quickly if I'm in towns and cities.
I've been trying to experiment with the various in-game settings to see if it affects the leak. Not sure, but when I set my rendering settings much lower (especially shadow quality?), it seems to take longer for the memory leak to absorb all of the available resources.
Since you all are working on 1.16 as a "health check" (in the words of ScottyB), could you try to fix this issue? It would help PC players out a lot, as the only solution to fixing this is to restart the game entirely and hope that the memory leak doesn't hit you when you're in the middle of a firefight.
Specs:
CPU: Intel i5-3570
Memory: 8 GB DDR3
GPU: Nvidia GTX 670 2 GB
HDD: 500 GB SSD