A call graph in a transaction snapshot shows the business transaction processing information on a particular tier that participated in the business transaction. A call graph lists the methods in a call stack and provides information about each call.

A call graph provides general information about the total execution time, the node name, the time stamp for the start of execution, and the unique identifier for the business transaction instance. You can use call graphs to diagnose performance issues and optimize the flow of a complex business transaction.

Call graphs are also captured by the Node.js Agent in process snapshots, which describe an instance of a CPU process on an instrumented Node.js node. See Event Loop Blocking in Node.js.