| <?xml version='1.0'?> <!--*-nxml-*--> |
| <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
| "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
| <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
| |
| <refentry id="oomd.conf" conditional='ENABLE_OOMD' |
| xmlns:xi="http://www.w3.org/2001/XInclude"> |
| <refentryinfo> |
| <title>oomd.conf</title> |
| <productname>systemd</productname> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>oomd.conf</refentrytitle> |
| <manvolnum>5</manvolnum> |
| </refmeta> |
| |
| <refnamediv> |
| <refname>oomd.conf</refname> |
| <refname>oomd.conf.d</refname> |
| <refpurpose>Global <command>systemd-oomd</command> configuration files</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <para><filename>/etc/systemd/oomd.conf</filename></para> |
| <para><filename>/etc/systemd/oomd.conf.d/*.conf</filename></para> |
| <para><filename>/usr/lib/systemd/oomd.conf.d/*.conf</filename></para> |
| </refsynopsisdiv> |
| |
| <refsect1> |
| <title>Description</title> |
| |
| <para>These files configure the various parameters of the |
| <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> userspace |
| out-of-memory (OOM) killer, |
| <citerefentry><refentrytitle>systemd-oomd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. |
| See <citerefentry><refentrytitle>systemd.syntax</refentrytitle><manvolnum>7</manvolnum></citerefentry> |
| for a general description of the syntax.</para> |
| |
| </refsect1> |
| |
| <xi:include href="standard-conf.xml" xpointer="main-conf" /> |
| |
| <refsect1> |
| <title>[OOM] Section Options</title> |
| |
| <para>The following options are available in the [OOM] section:</para> |
| |
| <variablelist class='config-directives'> |
| <varlistentry> |
| <term><varname>SwapUsedLimit=</varname></term> |
| |
| <listitem><para>Sets the limit for memory and swap usage on the system before <command>systemd-oomd</command> |
| will take action. If the fraction of memory used and the fraction of swap used on the system are both more than |
| what is defined here, <command>systemd-oomd</command> will act on eligible descendant control groups with swap |
| usage greater than 5% of total swap, starting from the ones with the highest swap usage. Which |
| control groups are monitored and what action gets taken depends on what the unit has configured for |
| <varname>ManagedOOMSwap=</varname>. Takes a value specified in percent (when suffixed with "%"), |
| permille ("‰") or permyriad ("‱"), between 0% and 100%, inclusive. Defaults to 90%.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><varname>DefaultMemoryPressureLimit=</varname></term> |
| |
| <listitem><para>Sets the limit for memory pressure on the unit's control group before |
| <command>systemd-oomd</command> will take action. A unit can override this value with |
| <varname>ManagedOOMMemoryPressureLimit=</varname>. The memory pressure for this property represents |
| the fraction of time in a 10 second window in which all tasks in the control group were delayed. For |
| each monitored control group, if the memory pressure on that control group exceeds the limit set for |
| longer than the duration set by <varname>DefaultMemoryPressureDurationSec=</varname>, |
| <command>systemd-oomd</command> will act on eligible descendant control groups, starting from the |
| ones with the most reclaim activity to the least reclaim activity. Which control groups are monitored |
| and what action gets taken depends on what the unit has configured for |
| <varname>ManagedOOMMemoryPressure=</varname>. Takes a fraction specified in the same way as |
| <varname>SwapUsedLimit=</varname> above. Defaults to 60%.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><varname>DefaultMemoryPressureDurationSec=</varname></term> |
| |
| <listitem><para>Sets the amount of time a unit's control group needs to have exceeded memory pressure |
| limits before <command>systemd-oomd</command> will take action. Memory pressure limits are defined by |
| <varname>DefaultMemoryPressureLimit=</varname> and <varname>ManagedOOMMemoryPressureLimit=</varname>. |
| Must be set to 0, or at least 1 second. Defaults to 30 seconds when unset or 0.</para></listitem> |
| </varlistentry> |
| |
| </variablelist> |
| </refsect1> |
| |
| <refsect1> |
| <title>See Also</title> |
| <para> |
| <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.resource-control</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd-oomd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>oomctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
| </para> |
| </refsect1> |
| |
| </refentry> |