Thanks Andy. You can always add to the standard datasource - e.g. you can add a complex datapoint to the datasource called, say, ActiveMemoryPercent, using this expression:
(TotalReal - AvailReal - Cached)/TotalReal*100
Then you can just use a single datapoint in your dashboard graphs.
[Actually, Ill add that to our standard datasource. We didn't initially, as otherwise people will be tempted to alert on it - but its often correct to have Active Memory be very high - databases and Java apps are often sized to use almost all memory. So long as there is no sustained swapping, its not an issue. But I digress...]
Anyway, using the complex datapoint approach will make creating dashboards easy - the only disadvantage is that you will only get data from the point when you create the datapoint onwards. The calculated graph data points show data from whenever the underlying metrics were collectored...
LMK if you want me to do that for your account - or you will be able to import from our standard core repository to get that change - but only after your account is updated to next release (as our core repository already has been.)
