13.1 Why monitor — dashboard before the outage call
A bike without a fuel gauge teaches you a lesson on the highway. Software without metrics teaches you a lesson at peak traffic.
Monitoring means collecting numbers about a system over time (CPU, memory, request rate, error rate, disk free) and watching them so you notice trouble before customers flood the support chat.
Why it matters for an Instagram-style badge API : when the badge API slows or the lab VM disk fills, you want a dashboard and one calm alert — not twenty panic messages and a guess.
| Flying blind | Monitoring habit |
|---|---|
| "App feels slow" | Latency and error rate on a chart |
| "Maybe disk is full?" | Disk used % with a threshold |
| Firefight only | Trend before the cliff |
Ravindra Bagale's Tip
Monitoring = graphs + alerts + action. Screenshot collection without runbook — interview madhe weak. Kay baghtos, kay karto — donhi sanga. Lakshat theva!