I checked the query made for that chart and we see it performs the following:
Query: {SELECT .PollItem.DeviceID, .PollItem.ID, .PollItem.DevDisplayName, .Item.DisplayName, .Item.DisplayDescription, .CurrentConnections.Avg, .TotalConnections.Sum, .MaximumConnections.Avg FROM CA.IM.DA.MF.NormalizedPoolConnectionInfo.NRM_POOL_CONN WHERE .Group.GroupID =...
The Metric Family (Internal Name) NormalizedPoolConnectionInfo is what that chart is looking at for Metrics and data.
In this case it's looking for data for the element for the CurrentConnections.Avg, .TotalConnections.Sum, .MaximumConnections.Avg metrics.
The Display Name for that Metric Family is Pool Connections.
I see that listed in the Metric Families screen shot above.
When we go to the devices Data Aggregator Inventory view, and select the Polled Metric Families tab, then select the line for the Pool Connections metric family... Do we see active polled elements?
Do we see a poll config entry in dcdebug for the device that references that particular metric family? We'd see a line something like:
Normalized Facet Type={http://im.ca.com/normalizer}NormalizedPollConnectionInfo
Does it contain the same elements from the Polled Metric Families tab in the UI?