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-rw-r--r--man/systemd.resource-control.xml36
1 files changed, 19 insertions, 17 deletions
diff --git a/man/systemd.resource-control.xml b/man/systemd.resource-control.xml
index d4c8fa7091..0551d75026 100644
--- a/man/systemd.resource-control.xml
+++ b/man/systemd.resource-control.xml
@@ -228,9 +228,11 @@
reclaimed as long as memory can be reclaimed from unprotected units.</para>
<para>Takes a memory size in bytes. If the value is suffixed with K, M, G or T, the specified memory size is
- parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. This controls the
- <literal>memory.low</literal> control group attribute. For details about this control group attribute, see
- <ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
+ parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. Alternatively, a
+ percentage value may be specified, which is taken relative to the installed physical memory on the
+ system. This controls the <literal>memory.low</literal> control group attribute. For details about this
+ control group attribute, see <ulink
+ url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
<para>Implies <literal>MemoryAccounting=true</literal>.</para>
@@ -247,7 +249,9 @@
aggressively in such cases. This is the main mechanism to control memory usage of a unit.</para>
<para>Takes a memory size in bytes. If the value is suffixed with K, M, G or T, the specified memory size is
- parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. If assigned the
+ parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. Alternatively, a
+ percentage value may be specified, which is taken relative to the installed physical memory on the
+ system. If assigned the
special value <literal>infinity</literal>, no memory limit is applied. This controls the
<literal>memory.high</literal> control group attribute. For details about this control group attribute, see
<ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
@@ -268,8 +272,9 @@
last line of defense.</para>
<para>Takes a memory size in bytes. If the value is suffixed with K, M, G or T, the specified memory size is
- parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. If assigned the
- special value <literal>infinity</literal>, no memory limit is applied. This controls the
+ parsed as Kilobytes, Megabytes, Gigabytes, or Terabytes (with the base 1024), respectively. Alternatively, a
+ percentage value may be specified, which is taken relative to the installed physical memory on the system. If
+ assigned the special value <literal>infinity</literal>, no memory limit is applied. This controls the
<literal>memory.max</literal> control group attribute. For details about this control group attribute, see
<ulink url="https://www.kernel.org/doc/Documentation/cgroup-v2.txt">cgroup-v2.txt</ulink>.</para>
@@ -284,17 +289,14 @@
<term><varname>MemoryLimit=<replaceable>bytes</replaceable></varname></term>
<listitem>
- <para>Specify the limit on maximum memory usage of the
- executed processes. The limit specifies how much process and
- kernel memory can be used by tasks in this unit. Takes a
- memory size in bytes. If the value is suffixed with K, M, G
- or T, the specified memory size is parsed as Kilobytes,
- Megabytes, Gigabytes, or Terabytes (with the base 1024),
- respectively. If assigned the special value
- <literal>infinity</literal>, no memory limit is applied. This
- controls the <literal>memory.limit_in_bytes</literal>
- control group attribute. For details about this control
- group attribute, see <ulink
+ <para>Specify the limit on maximum memory usage of the executed processes. The limit specifies how much
+ process and kernel memory can be used by tasks in this unit. Takes a memory size in bytes. If the value is
+ suffixed with K, M, G or T, the specified memory size is parsed as Kilobytes, Megabytes, Gigabytes, or
+ Terabytes (with the base 1024), respectively. Alternatively, a percentage value may be specified, which is
+ taken relative to the installed physical memory on the system. If assigned the special value
+ <literal>infinity</literal>, no memory limit is applied. This controls the
+ <literal>memory.limit_in_bytes</literal> control group attribute. For details about this control group
+ attribute, see <ulink
url="https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt">memory.txt</ulink>.</para>
<para>Implies <literal>MemoryAccounting=true</literal>.</para>