Подавить сообщения в /var/log/messages вида: Created slice, User Slice of nginx и т.п.
To suppress these log entries in /var/log/messages, create a discard filter with rsyslog, e.g., run the following command: # echo ‘if $programname == “systemd” and ($msg contains “Starting Session” or $msg contains “Started Session” or $msg contains “Created slice” or $msg contains “Starting user-” or $msg contains “Starting User Slice of” or $msg contains “Removed session” …