1. A method comprising: grouping a plurality of entities into one or more groups within a distributed event processing architecture, according to a manner in which each of the plurality of entities is expected to be affected by an event, wherein to be affected by an event at an entity comprises the entity to be dependent for its operation, at least in part, upon a resource associated with the event; operating a plurality of entity managers in the distributed event processing architecture, each said entity manager configured to route to at least one other entity manager of the plurality of entity managers an event notification in response to an event; receiving, at a first entity manager, an event notification associated with an occurrence at a first component; identifying a second component affected by the occurrence; identifying an entity monitoring the second component; determining that the entity monitoring the second component is not located on a same server as the first entity manager; routing the event notification associated with the occurrence to a second entity manager configured to manage the entity monitoring the second component; assessing an efficiency of the one or more groups based on a number of notifications, including the event notification, passed between the first entity manager and the second entity manager; and reassigning the entity monitoring the second component to another group of the one or more groups based on the efficiency assessment, the reassignment reducing the rate at which notifications are passed between the first entity manager and the second entity manager.