It looks like it’s just running out of memory… How much memory does the program use? How long does it take to crash? Can you open up observer on it and watch it to see if any specific process or binary heap or something keeps growing without shrinking?
EDIT: And for some reason it looks capped to 2gigs of ram?
Oooo, I think I see, you are allocating more ram than what’s available and you have no SWAP memory setup.
Either reduce the memory load of the system (again check your beam program and see what’s eating memory via :observer or so), and/or add swap. You should add swap anyway, I’d say no less than 8 gigs of swap for your system. You can add swap while the system is in use for note, instructions online. 
