Apparatus for monitoring a selected tier in a multi-tier computing environment, the apparatus including a context agent and a dynamic tier extension, the context agent associated with the selected tier and coupled with other context agents, each of which is associated with a respective tier, the dynamic tier extension coupled with the context agent and with specific predetermined points of the selected tier, the dynamic tier extension monitoring request traffic passing through the selected tier, the monitored request traffic including at least one entering request received at a request entry port from an adjacent tier, the dynamic tier extension identifying each request in the monitored request traffic and sending at least a request identifier to the context agent, the context agent also receiving information relating to the request context of the entering request from the context agent associated with the adjacent tier, the context agent associating the information relating to the request context of the entering request with the entering request, in accordance with the received request identifier.