Hmm... Typical. I say that it is resolved and then dig a little deeper only to find that I still have the issue on one of the host machines.
The problem here is that the "Manage Monitored Servers" page shows that the status for this host is :
However looking at the "Overviews" screen for this host, the host shows no alerts and the sparkline graphs for Processor and Memory are not updating.
Also on the overview page for this host, none of the metrics are showing any values
System processes (top 10)
I have tried the following to resolve this :
* Removed the cluster from monitoring and re-added
* Changed the account being used for the Base Monitor