mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-12-24 21:34:08 +03:00
d06e7fb532
oomd.conf has two parameters with fractionals: SwapUsedLimit= and DefaultMemoryPressureLimit=, but one accepts permyriads, the other only percentages, for no apparent reason. One carries the "Percent" in the name, the other doesn't. Let's clean this up: always accept permyriads, and drop the suffix, given that it is misleading. I figure we should internally try to focus on scaling everything relative to UINT32_MAX, and if that isn't in the cards at least 10000, but never permille nor percent unless there's a really really good reason for it (e.g. interface defined by someone else).
101 lines
4.7 KiB
XML
101 lines
4.7 KiB
XML
<?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 swap usage on the system before <command>systemd-oomd</command>
|
|
will take action. If the fraction of swap used on the system is more than what is defined here,
|
|
<command>systemd-oomd</command> will act on eligible descendant control groups, starting from the
|
|
ones with the highest swap usage to the lowest 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>.
|
|
Defaults to 30 seconds when this property is unset or set to 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>
|