A method performed by a monitoring tool in a computer system, the method including: displaying a user interface including information regarding a first resource; running a correlation algorithm to determine whether other resources in the computer system show correlation for one or more performance metrics; selecting one or more other resources as suggestions based on results of the correlation algorithm; displaying selected resources in a list with the base resource and render a graph of performance metrics over time with performance data of the base resource and the suggested resources overlaid; and overlaying further performance data on the graph for a resource searched for, and selected by, the human user.