1. An apparatus, comprising: one or more processors; a computer-readable storage medium comprising one or more stored sequences of instructions which, when executed by the one or more processors, cause the one or more processors to perform: generating relationship information based on relationships between one or more events that are generated by one or more managed systems; sending the relationship information to one or more of the managed systems; wherein the relationship information is configured to allow the one or more managed systems to determine whether reporting of the one or more events, by the one or more managed systems, should be suppressed; receiving, from one of the managed systems, a report about an event, when reporting of the event cannot be suppressed.