[LinuxBender]

I avoid swap since it needs to be encrypted to protect sensitive data written out from memory to disk. Instead I reserve more memory for the kernel vm.min_free_kbytes based on the installed ram and also based and some redhat suggestions, reserve more memory in vm.admin_reserve_kbytes and vm.user_reserve_kbytes, adjust vm.vfs_cache_pressure based on server role and finally set vm.overcommit_ratio to 0. This worked well on over 50k bare metal servers with no swap. OOM was extremely rare outside of dev. OOM basically only happened with automation had human induced bugs that deployed too many java instances to a server. All of the servers had anywhere from 512GB to 3TB ram and nearly all the memory was in use at all times.