systemd oomd.conf 5 oomd.conf oomd.conf.d Global systemd-oomd configuration files /etc/systemd/oomd.conf /etc/systemd/oomd.conf.d/*.conf /usr/lib/systemd/oomd.conf.d/*.conf These files configure the various parameters of the systemd1 userspace out-of-memory (OOM) killer, systemd-oomd.service8. See systemd.syntax7 for a general description of the syntax. The following options are available in the [OOM] section: SwapUsedLimitPercent= Sets the limit for swap usage on the system before systemd-oomd will take action. If the percentage of swap used on the system is more than what is defined here, systemd-oomd will act on eligible descendant cgroups, starting from the ones with the highest swap usage to the lowest swap usage. Which cgroups are monitored and what action gets taken depends on what the unit has configured for ManagedOOMSwap=. Takes a percentage value between 0% and 100%, inclusive. Defaults to 90%. DefaultMemoryPressureLimitPercent= Sets the limit for memory pressure on the unit's cgroup before systemd-oomd will take action. A unit can override this value with ManagedOOMMemoryPressureLimitPercent=. The memory pressure for this property represents the fraction of time in a 10 second window in which all tasks in the cgroup were delayed. For each monitored cgroup, if the memory pressure on that cgroup exceeds the limit set for more than 30 seconds, systemd-oomd will act on eligible descendant cgroups, starting from the ones with the most reclaim activity to the least reclaim activity. Which cgroups are monitored and what action gets taken depends on what the unit has configured for ManagedOOMMemoryPressure=. Takes a percentage value between 0% and 100%, inclusive. Defaults to 60%. systemd1, systemd.resource-control5, systemd-oomd.service8, oomctl1