There are some mistakes in these blog posts, especially the one about overcommit.

systemd allows setting cgroup memory limits.

Just tune the kernel watermarks - vm.min_free_kbytes and vm.watermark_scale_factor

3. vm.oom_kill_allocating_task is a footgun. It kills the last task that asked for memory and it could be any random task in the system.

4. disabling overcommit is another footgun, it makes malloc fail long before the memory is exhausted. See for a detailed explanation https://unix.stackexchange.com/a/797888/1027

It seems to be a persistent myth. The Linux kernel explicitly excludes active VM_EXEC pages from reclaim.