Log  files  are rotated when they grow bigger then size bytes,
          but  not  before  the  additionally  specified  time  interval
          (daily,  weekly, monthly, or yearly).  The related size option
          is similar except that it is mutually exclusive with the  time
          interval  options, and it causes log files to be rotated with-
          out regard for the last rotation time.  When minsize is  used,
          both the size and timestamp of a log file are considered.