Modules
Short articles with interactive visuals. Start anywhere, but memory leaks are a good first stop — the pattern is unmistakable once you've seen it.
Reading logs without drowning
Filtering signal from noise, structured vs unstructured logs, correlating by request ID and timestamp.
Kibana essentials
The 20% of features that cover 80% of debugging.
Grafana essentials
The 4 panels to check first — error rate, latency p99, resource usage, request volume — and how to read them together.
Spotting a memory leak
Sawtooth vs staircase patterns, deploy markers, and why RSS climbing while traffic stays flat is the tell.
The rollback decision
A decision framework — thresholds, blast radius, timing correlation with deploys — when to roll back immediately vs investigate live.
Building a baseline
Why you need to know normal before an incident, not during one.