Metrics, counters, graphs - we may think that this is what it takes to build observability. But once we get issues, we don’t know how to configure thresholds, when to set alarms, or how to troubleshoot problems. Observability is not about numbers, it is about understanding. In this talk, we’re going to see what it takes to build modern observability. We’ll see the main parts, learn how to use signals efficiently, and how to turn raw numbers into actionable insights in all stages of SDLC. Content: - Metrics, counters, graphs - Observability instead of raw data - Automated troubleshooting - Closing the loop across the whole SDLC