I’m using the Opennms-Helm datasource.
I can create a single graph panel with 2 metrics used as input for a calculation:
Expression: hrStorage * hrStorageAllocUnits
C is the only metric visible and I get to see my disk size.
Now I introduce a query that returns 5 server IDs, so metric A and B become Node: Server$id
What calculation do I put into the expression in C to perform the calculation based on the various servers selected as part of the multi-value?