For anyone feeling brave enough to disable overcommit after reading this, be mindful that default `vm.overcommit_ratio` is 50% which means that if no swap is available, on a system with 2GB of total RAM, more than 1GB of RAM can't be allocated and requests will fail with preemptive OOMs. (e.g. postgresql servers typically disable overcommit)
- https://github.com/torvalds/linux/blob/master/mm/util.c#L753