I've not seen OOM on any of my systems for a very long time but I also set overcommit ratio to 0 and vm.min_free_kbytes to a higher number based on a formula.

I've not seen OOM on any of my systems for a very long time but I also set overcommit ratio to 0 and vm.min_free_kbytes to a higher number based on a formula. I have not allocated swap in a couple decades even in tiny VM's at VPS providers. If memory gets tight I move apps to a node with more memory and leave plenty free for inode/dentry/page cache. Unused RAM is never wasted.