Monitoring
ELI5 — The Vibe Check
Monitoring is keeping a constant eye on your app while it runs — tracking whether it's up, how fast it responds, how many errors it throws, and how much memory it uses. Without monitoring, you only know something's broken when users complain. With monitoring, you know before they do.
Real Talk
Monitoring is the practice of continuously collecting, aggregating, and analyzing metrics from systems to track health and performance. Modern monitoring uses time-series databases (Prometheus), visualization (Grafana), and alerting to detect anomalies, triggering human or automated responses.
When You'll Hear This
"Set up monitoring so we get alerted when error rate spikes." / "Check the monitoring dashboard — the CPU is pegged at 95%."
Related Terms
Alerting
Alerting is the part of monitoring that actually wakes people up when something goes wrong.
Datadog
Datadog is the premium all-in-one observability platform that enterprise teams buy when they want metrics, logs, traces, APM, and security monitoring from...
Grafana
Grafana is the visualization layer for all your monitoring data.
Logging
Logging is writing a diary for your program.
Metrics
Metrics are the numbers your app tracks about itself over time — requests per second, error rate, CPU usage, response time, active users.
Observability
Observability is the ability to understand what's happening inside your system from the outside, using three types of data: metrics (numbers), logs (events...