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Track Rate, Errors, Duration. The minimum viable service dashboard.
What you're seeing
RED is the modern reduction of Google's four Golden Signals: Rate (req/s), Errors (errors/s), Duration (p99 latency). Three signals, one dashboard, catches most production issues.
Add saturation (USE: utilization, saturation, errors) for resource-bound systems.
★ KEY TAKEAWAY
RED: Rate, Errors, Duration. The three numbers every service dashboard must show.
▶ WHAT TO TRY
- Click Start for baseline metrics.
- Click Inject incident — watch errors spike and latency degrade.