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NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION DIRECTORIES AND PRECEDENCE | [OOM] SECTION OPTIONS | SEE ALSO | COLOPHON |
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OOMD.CONF(5) oomd.conf 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 systemd(1)
userspace out-of-memory (OOM) killer, systemd-oomd.service(8).
See systemd.syntax(7) for a general description of the syntax.
The default configuration is defined during compilation, so a
configuration file is only needed when it is necessary to deviate
from those defaults. By default, the configuration file in
/etc/systemd/ contains commented out entries showing the defaults
as a guide to the administrator. This file can be edited to
create local overrides.
When packages need to customize the configuration, they can
install configuration snippets in /usr/lib/systemd/*.conf.d/ or
/usr/local/lib/systemd/*.conf.d/. The main configuration file is
read before any of the configuration directories, and has the
lowest precedence; entries in a file in any configuration
directory override entries in the single configuration file.
Files in the *.conf.d/ configuration subdirectories are sorted by
their filename in lexicographic order, regardless of in which of
the subdirectories they reside. When multiple files specify the
same option, for options which accept just a single value, the
entry in the file with the lexicographically latest name takes
precedence. For options which accept a list of values, entries
are collected as they occur in files sorted lexicographically.
Files in /etc/ are reserved for the local administrator, who may
use this logic to override the configuration files installed by
vendor packages. It is recommended to prefix all filenames in
those subdirectories with a two-digit number and a dash, to
simplify the ordering of the files.
To disable a configuration file supplied by the vendor, the
recommended way is to place a symlink to /dev/null in the
configuration directory in /etc/, with the same filename as the
vendor configuration file.
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%.
systemd(1), systemd.resource-control(5), systemd-oomd.service(8),
oomctl(1)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2020-12-18. (At that
time, the date of the most recent commit that was found in the
repository was 2020-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
systemd 247 OOMD.CONF(5)
Pages that refer to this page: oomctl(1), systemd.resource-control(5), systemd.directives(7), systemd.index(7), systemd-oomd.service(8)
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