How to monitor memory utilization using F5 MP

I ran the discovery couple of times and kept refreshing the collection rules and I've seen more counter and for some of them data is plotted. But still I'm not able to see all of them in each unit. Sometimes when I run f5mpcmd /RCR from cli

 

it returns an error saying that the monitoring service is not available even if the service is running. I had to stop and restart it few times then it runs successfully.