AppDynamics monitors every execution of a business transaction within an application that has been instrumented, either using our agents or through OpenTelemetry. Both Business Transaction and Process Snapshots capture the details necessary for gaining a deeper understanding of method call performance...answering questions like, what line of code is taking the longest to run?

Transaction Snapshot documentation: https://docs.appdynamics.com/appd/23.x/latest/en/application-monitoring/business-transactions/troubleshoot-business-transaction-performance-with-transaction-snapshots/transaction-snapshot-collection

Diagnostic Sessions documentation: https://docs.appdynamics.com/appd/23.x/latest/en/application-monitoring/business-transactions/troubleshoot-business-transaction-performance-with-transaction-snapshots/diagnostic-sessions