An agent interfacing with a first software component identifies a first network connection between the first software component and a second software component. An amount of data exchanged between the first and second software components over the first network connection is determined. A particular fragment indicator is generated based on the amount of data. The particular fragment indicator is sent to an instrumentation broker for use in the identification of a particular transaction fragment. In some aspects, the particular transaction fragment can be used in the analysis of a transaction including the particular transaction fragment.