org.freedesktop.oom1

Name

org.freedesktop.oom1 — The D-Bus interface of systemd-oomd

Introduction¶

systemd-oomd.service(8) is a system service which implements a userspace out-of-memory (OOM) killer. This page describes the D-Bus interface.

The Manager Object¶

The service exposes the following interfaces on the Manager object on the bus:

node /org/freedesktop/oom1 {
  interface org.freedesktop.oom1.Manager {
    methods:
      DumpByFileDescriptor(out h fd);
    signals:
      Killed(s cgroup,
             s reason);
  };
  interface org.freedesktop.DBus.Peer { ... };
  interface org.freedesktop.DBus.Introspectable { ... };
  interface org.freedesktop.DBus.Properties { ... };
};

Methods¶

Killed signal is sent when any cgroup is killed by oomd.

Note that more reasons will be added in the future, and the table below will be expanded accordingly.

Table 1. Killing reasons

Reason	Description
memory-used	Application took too much memory and swap.
memory-pressure	Application took enough memory and swap to cause sufficient slowdown of other applications.

Versioning¶

These D-Bus interfaces follow the usual interface versioning guidelines.