Commenting Fedora developers enable background process by default for early response to low memory in the system, Lennart Poettering about plans to integrate another solution into systemd - . The oomd handler is being developed by Facebook, which is developing the PSI (Pressure Stall Information) kernel subsystem in parallel, which allows the user-space out-of-memory handler to analyze information about the waiting time for obtaining various resources (CPU, memory, I / O) to accurately assess the level of system load and the nature of the slowdown.
Oomd is in the final stages of creating a universal product suitable for any workload without additional tuning. Once the final missing components of the PSI ("iocost") interface are added to the Linux kernel, Facebook intends to commit oomd, or a simplified version of it, to be included in systemd. It is expected that this will happen in six months or a year. Earlyoom can be used in Fedora as a temporary solution until oomd is up and running, but in the long run Pottering thinks oomd is the future.
Source: opennet.ru