Chapter 2: Signal Types

In this chapter we review different signal types most often used, how to instrument and collect each, and discuss the costs and benefits of doing that. With observability you want to take an Return-On-Investment (ROI) driven approach. In other words, you need to understand the costs of each signal type and what it enables you to do.

1. Reference Example
2. Assessing Instrumentation Costs
3. Logs
4. Metrics
5. Traces
6. Selecting Signals

See also:

• Code snippets for Chapter 2
• Further reading