Why does snmpd try to log everything by default in Fedora? If you’re polling every five minutes or so for MRTG or a commercial product like Solarwinds, you might find /var/log/messages filling up with successful connection messages:
Oct 22 04:00:01 ServerName snmpd[2089]:last message repeated 5 times
Oct 22 04:00:01 ServerName snmpd[2089]: …