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<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" >
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="org.freedesktop.oom1" conditional='ENABLE_OOMD'
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>org.freedesktop.oom1</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>org.freedesktop.oom1</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>org.freedesktop.oom1</refname>
<refpurpose>The D-Bus interface of systemd-oomd</refpurpose>
</refnamediv>
<refsect1>
<title>Introduction</title>
<para>
<citerefentry><refentrytitle>systemd-oomd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
is a system service which implements a userspace out-of-memory (OOM) killer. This page describes the
D-Bus interface.</para>
</refsect1>
<refsect1>
<title>The Manager Object</title>
<para>The service exposes the following interfaces on the Manager object on the bus:</para>
<programlisting executable="systemd-oomd" node="/org/freedesktop/oom1" interface="org.freedesktop.oom1.Manager">
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 { ... };
};
</programlisting>
<!--method DumpByFileDescriptor is not documented!-->
<!--Autogenerated cross-references for systemd.directives, do not edit-->
<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.oom1.Manager"/>
<variablelist class="dbus-interface" generated="True" extra-ref="org.freedesktop.oom1.Manager"/>
<variablelist class="dbus-method" generated="True" extra-ref="DumpByFileDescriptor()"/>
<variablelist class="dbus-signal" generated="True" extra-ref="Killed()"/>
<!--End of Autogenerated section-->
<refsect2>
<title>Methods</title>
<para><function>Killed()</function> signal is sent when any cgroup is killed by oomd.</para>
<para>Note that more reasons will be added in the future, and the table below will be expanded accordingly.</para>
<table>
<title>Killing reasons</title>
<tgroup cols="2" align="left" colsep="1" rowsep="1">
<colspec colname="reason"/>
<colspec colname="description"/>
<thead>
<row>
<entry>Reason</entry>
<entry>Description</entry>
</row>
</thead>
<tbody>
<row>
<entry>memory-used</entry>
<entry>Application took too much memory and swap.</entry>
</row>
<row>
<entry>memory-pressure</entry>
<entry>Application took enough memory and swap to cause sufficient slowdown of other applications.</entry>
</row>
</tbody>
</tgroup>
</table>
</refsect2>
</refsect1>
<xi:include href="org.freedesktop.locale1.xml" xpointer="versioning"/>
<refsect1>
<title>History</title>
<refsect2>
<title>The Manager Object</title>
<para><function>Killed()</function> was added in version 252.</para>
</refsect2>
</refsect1>
<refsect1>
<title>See Also</title>
<para><simplelist type="inline">
<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>systemd-oomd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>oomctl</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
</simplelist></para>
</refsect1>
</refentry>
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