How do you structure a Grafana dashboard for a production service?

A well-structured production dashboard follows the USE or RED methodology:

RED (for services):

• Rate: Requests per second
• Errors: Error rate (%)
• Duration: Latency (p50, p90, p99)

Top-level layout: Start with an SLO summary panel so on-call knows immediately if SLO is being violated. Then drill-down panels: per-endpoint breakdown, error log links, infrastructure metrics (CPU, memory). Use variables for environment and service selection.