https://www.pistack.xyz/tags/system-administration/ Recent content in System-Administration on Pi Stack Hugo en-us Wed, 27 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-27-self-hosted-linux-oom-prevention-earlyoom-systemd-oomd-psi-guide/ Wed, 27 May 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-05-27-self-hosted-linux-oom-prevention-earlyoom-systemd-oomd-psi-guide/ <p>The Linux Out-Of-Memory (OOM) killer is a last-resort mechanism that terminates processes when the system runs out of memory. By the time it activates, your services are already degraded — swap is exhausted, page reclaim has failed, and the system may be completely unresponsive. The OOM killer&rsquo;s heuristic process selection often terminates the wrong service, taking down your database while leaving memory-leaking background processes alive.</p>