Scalable systems and methods for near real time processing of a substantial volume of event data streams are disclosed. A concurrent throughput receiver is coupled to an input of a processor for receiving the substantial volume of event data streams, and implementing substantially concurrent throughput of the substantial volume of event data streams. The systems and methods may provide for real time application monitoring, such as by aggregating information to a distributed cache from a plurality of entities, where the entities are structured in a nodal hierarchy, and summarizing to a summary database the information from the nodal hierarchy into summary level statistics for each of the nodes of the nodal hierarchy.