Log-files rotation is performed in the following file:
/var/log/saymon/saymon-rest-server.log /var/log/saymon/saymon-server.log - log-files location;
daily - daily rotation;
missingok - do not stop rotation if one of the files is missing;
rotate N - log-files storing duration in days;
compress - compress log-files to .gzip;
notifempty - do not rotate log-file if it is empty;
copytruncate - write log to one file, truncating it on each rotation step.