I monitor my Synology NAS with the SNMP Synology System Health sensor. Unfortunately, comparing to the Synology resource monitor interface, both the sensor channels CPU Load and Memory Free show wrong values while, for example, the temperature is correct. CPU load usage even exceeds 100% in PRTG.
Where do these values come from? Which OIDs does the SNMP Synology System Health sensor query to display CPU and memory percentages? Does PRTG do some sort of calculation?