1. A method, comprising: transmitting polling requests to a plurality of data processing devices associated with a performance metric domain; receiving, in response to the polling requests, a plurality of performance metrics from the plurality of data processing devices; grouping the plurality of performance metrics into a plurality of performance metric groups based on their respective associations with the plurality of data processing devices; determining, based on the plurality of performance metrics, a plurality of constituent consolidated performance metrics, each of the plurality of constituent consolidated performance metrics corresponding to at least one of the plurality of performance metric groups; determining, based on the plurality of constituent consolidated performance metrics, a consolidated performance metric for the performance metric domain; and outputting for display a graph comprising the consolidated performance metric for the performance metric domain.