Same here.
>= 25% RAM available, swap nearly empty.
It's not only killing the kvm-process:
Jan 5 00:16:32 serverA kernel: [607936.489702] Out of memory: Kill process 3660 (node /root/dash) score 17 or sacrifice child
Jan 5 01:17:13 serverA kernel: [ 3484.604788] Out of memory: Kill process...