WMI polling response is typically slow due to the dependence on Windows’ RPC subsystem to make a TCP connection, negotiate a port shift and reconnect, evaluate and respond to the WMI query, then respond cycle. This response will frequently require more than the default 3 seconds timeout, and may exceed the default 30 second polling period.

The 30 second polling is fine for ping/echo and SNMP queries, but WMI can run much more slowly, so we provide a timeout setting in the probe, which we recommend be set to a high value, like 120 seconds, in order to receive a response even if the polled server is busy. Additionally, polling more often than the two minutes is not helpful, so we recommend setting poll interval higher than the timeout, for example every 5 minutes.