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Level 3 overview

Level 3: Transaction insights

What you learned in Module 3:

  • Shift from infrastructure view to service view.
  • RED metrics show service health: Rate, Errors, Duration.
  • Service Inventory and Service Graph reveal service relationships.
  • Getting instrumented enables service-level visibility.

What you’ll do in this module:

Level 3 tools let you drill from service averages to individual transactions:

  • What problems Level 3 solves — Moving from service averages to specific transactions
  • Distributed tracing — Following a request across all services
  • Continuous profiling — Code-level CPU/memory analysis
  • Frontend observability — Real user session capture
  • AI observability — Monitoring LLM performance
  • Operations at Level 3 — Request-level troubleshooting

Estimated time: 15-20 minutes

Script

You’ve learned how to move from infrastructure thinking to service thinking. Excellent progress.

Now let’s go deeper with Level 3: Transaction Insights. At this level, you zoom from service averages into individual requests. You can see exactly what happened in one specific user’s transaction. In this module, you’ll learn about distributed tracing, continuous profiling, frontend observability, and how to operate at this level of precision.

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