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Amend documentation for LimitNPROC=

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Jakob Lell 2022-05-01 22:52:39 +02:00 committed by Zbigniew Jędrzejewski-Szmek
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commit 14736ab6ff
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man/systemd.exec.xml
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@ -846,6 +846,14 @@ CapabilityBoundingSet=~CAP_B CAP_C</programlisting>
runtime, and are generally more expressive. For example, <varname>MemoryMax=</varname> is a more
powerful (and working) replacement for <varname>LimitRSS=</varname>.</para>
<para>Note that <varname>LimitNPROC=</varname> will limit the number of processes from one (real) UID and
not the number of processes started (forked) by the service. Therefore the limit is cumulative for all
processes running under the same UID. Please also note that the <varname>LimitNPROC=</varname> will not be
enforced if the service is running as root (and not dropping privileges). Due to these limitations,
<varname>TasksMax=</varname> (see <citerefentry><refentrytitle>systemd.resource-control</refentrytitle>
<manvolnum>5</manvolnum></citerefentry>) is typically a better choice than <varname>LimitNPROC=</varname>.
</para>
<para>Resource limits not configured explicitly for a unit default to the value configured in the various
<varname>DefaultLimitCPU=</varname>, <varname>DefaultLimitFSIZE=</varname>, … options available in
<citerefentry><refentrytitle>systemd-system.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, and –