journald allows to configure itself through the configuration file or the command line.
SystemMaxUse= the maximum volume that the logs can occupy on the disk.
SystemKeepFree= — the amount of free space that must remain on disk after you save the log information;
SystemMaxFileSize= — the volume of log file at which it must be deleted from disk.
RuntimeMaxUse= the maximum volume that the logs can occupy in the file system /run;
RuntimeKeepFree= — the amount of free space that should remain on the filesystem /run after saving the logs;
RuntimeMaxFileSize= — the volume of log file at which it must be deleted from the file system /run.
Which option is more correct given the of saving settings after reboot or shutdown?