1. A method comprising: receiving, at a computer system, first event data indicative of computer network activity of an entity that is part of or has interacted with a computer network, the computer system including a real-time event processing engine and a batch event processing engine; constructing a variable behavior baseline of the entity by using one of the real-time event processing engine or the batch event processing engine in the computer system, based on the first event data, the variable behavior baseline being representative of computer network activity of a particular type by the entity; and sharing the variable behavior baseline between the real-time event processing engine and the batch event processing engine.