Comment by nisa

This is dangerous advice. At least on Ubuntu 16.04 with stock kernel running due to memory pressure into swap kills the systems. Basically everything times out and you can only hard-reboot. Without swap you have an OOM at least something you can recover from. If you need swap just add a little like 1-4gb - because if you have spinning disks 64gb swap won't help you at all because every request to swap is magnitudes more slower. Might be different with NVMe but it's still noticable.