1. A method of monitoring performance of an application server for a group of servers in which one or more threads that manage the group of servers are executed, said method comprising: issuing a command to an operating system of the application server to return a resource consumption value representative of the amount of computing resource consumed by one or more threads; storing the resource consumption value; repeating said issuing and said storing multiple times over a time period; and displaying a graph of the amount of computing resources consumed by the one or more threads over the time period using the stored resource consumption values.