What is systemd-oomd and does it replace OOM killer?

systemd-oomd preempts kernel OOM using PSI and cgroups, killing targeted processes early for predictable fails.

How do I install systemd-oomd on Ubuntu?

sudo apt install systemd-oomd; sudo systemctl enable --now systemd-oomd.service.

Will systemd-oomd kill my important services?

Set policy on slices like system.slice; it picks stressed descendants, not the whole group.

systemd-oomd: Kill the Memory Hog Before It Freezes Your Linux Server

Your self-hosted AI model just slurped all the RAM. SSH lags. Services choke. systemd-oomd steps in early, knives out for the greedy process — before total meltdown.

theAIcatchup Apr 11, 2026 3 min read

Linux terminal output showing systemd-oomd killing a memory-hungry cgroup

⚡ Key Takeaways

systemd-oomd preempts memory death spirals using PSI and cgroups for predictable kills. 𝕏
Enable on cgroup v2 systems with memory accounting and swap for best results. 𝕏
Tune slice-level policies aggressively for servers; test with stress-ng first. 𝕏

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theAIcatchup

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#Linux memory management #PSI monitoring #PSI pressure #PSI pressure stall #cgroups v2 #systemd-oomd

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Originally reported by Dev.to

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