Updating graphs

Hi is there a more efficient way to update graphs?

Video tutorial teaches to make an update using the scheduler. Is there a way to identify new entries and just make a SUM or COUNT of these entries?

I don't want it to consume resources from the server each time the process is running or everytime a user requests to update the graphs..

Thanks.

You can schedule a process to update objects displayed by a graph every now and then (see Scheduling)

Sue the "Auto-Refresh" options available on the Chart Query.