AppDynamics automatically detects incoming requests as business transactions and traces the transactions as they flow through the various tiers of the application.
To analyze a Business Transaction from the Business Transaction List:
1. Double click a transaction to display the Transaction Dashboard.
2. The flow map only shows the flows for the current transaction
Transaction Snapshots Tab
Shows executions of the business transactions
1. Double click to access the business transaction dashboard
This shows the timing between tiers
To answer your question on how to analyze the execution of the transaction as it enters the application frameworks, you need to drill down into the originating transaction.
Go to the Call Graph . This shows how the transaction executes within the specific node.
AppDynamics displays the full call stack with execution times and latency breakdown.