28. The system of claim 20 further comprises a root cause estimator that identifies root cause candidates for a performance problem in the distributed computing environment, where the root cause candidates are identified from the plurality of event records and a plurality of event causality records forming an event graph in the repository.
28. The system of claim 20 further comprises a root cause estimator that identifies root cause candidates for a performance problem in the distributed computing environment, where the root cause candidates are identified from the plurality of event records and a plurality of event causality records forming an event graph in the repository. 30. The system of claim 28 wherein the event graph is defined as a weakly connected graph, where the nodes of the weakly connected graph are formed by event records and the edges of the graph are formed by event causality records.