Prerequisites Link to heading
Make sure you have systemd installed with at least version 248:
pacman -Ss systemd | grep "core/systemd "
# core/systemd 248.2-1.1 [installed]
Setup Link to heading
Check if the service is active:
systemctl status systemd-oomd.service
Enable and start it with:
sudo systemctl enable systemd-oomd.service
sudo systemctl start systemd-oomd.service
Trial Link to heading
Check it’s working properly by starting htop in a terminal window:
htop
And in another fill up your memory with a process:
systemd-run --user tail /dev/zero
If all goes well that process will be killed an you won’t notice any slowdown of
your machine. Worst case, and common before systemd-oomd, your machine would
have been usuable and you needed a forced restart.
Config Link to heading
Edit /etc/systemd/oomd.conf with your custom settings:
[OOM]
SwapUsedLimit=90%
DefaultMemoryPressureLimit=60%
DefaultMemoryPressureDurationSec=30s