Methods, systems, and apparatus, including computer program products, implementing techniques for receiving a first information related to a first transaction associated with a first user session with a multi-tier enterprise application, the first information including performance data that is representative of how well components in at least two tiers of the enterprise application perform in executing the first transaction; and determining based on the first information whether the first transaction is associated with a prioritized aspect of the enterprise application, and if so, taking an action based on the determining.