- control how much disk space the
- journal shall always leave free for
- other uses if less than the disk space
- configured in
- <varname>SystemMaxUse=</varname> and
- <varname>RuntimeMaxUse=</varname> is
- available. Defaults to 15% of the size
- of the respective file
- system. <varname>SystemMaxFileSize=</varname>
+ control how much disk space
+ systemd-journald shall leave free for
+ other uses.
+ <command>systemd-journald</command>
+ will respect both limits and use the
+ smaller of the two values.</para>
+
+ <para>The first pair defaults to 10%
+ and the second to 15% of the size of
+ the respective file system. If the
+ file system is nearly full and either
+ <varname>SystemKeepFree=</varname> or
+ <varname>RuntimeKeepFree=</varname> is
+ violated when systemd-journald is
+ started, the value will be raised to
+ percentage that is actually free. This
+ means that if before there was enough
+ free space and journal files were
+ created, and subsequently something
+ else causes the file system to fill
+ up, journald will stop using more
+ space, but it'll will not removing
+ existing files to go reduce footprint
+ either.</para>
+
+ <para><varname>SystemMaxFileSize=</varname>