1. A method of monitoring a plurality of resource elements of a same type, said method comprising: enabling an user to specify said plurality of resource elements as a resource pool, and an attribute of interest related to said resource pool; monitoring each of said plurality of resource elements to determine a plurality of sample values corresponding to said attribute of interest for each of said plurality of resource elements at different time points; and displaying an aggregated information for said attribute of interest based on said plurality of sample values.