1. A computing system for determining performance factors for using in performance modeling of a deployed subject system, the computing system comprising: a plurality of software components comprising the subject system, wherein each of the components is susceptible to event tracing while executing on the computing system; a tracing component configured to trace events of the components of the subject system into an event log as the components execute on the computing system; a transaction identification table comprising starting and ending actions for transactions performed by the subject system; and a transaction identification component configured to: identify actions, executed by the components of the subject system, from traced events; identify related actions corresponding to a transaction according to the starting and ending actions in the transaction identification table; and store the related actions in the transaction workflow data store as corresponding to the transaction.