Building a useful edge observability model

Global systems need regional context

An overall error rate can look healthy while one region is failing for a meaningful slice of traffic. Edge telemetry therefore needs route, region, deployment, and request metadata on every record.

Four signals cover most incidents

• Latency: measure p50, p95, and p99 separately.
• Errors: group by HTTP status, function, and release version.
• Traffic: watch request volume, concurrency, and cache behavior.
• Dependencies: capture upstream timing and availability for databases and third-party APIs.

Correlate with deployment IDs

A deployment identifier is the bridge between application and platform telemetry. When a release is promoted, the identifier becomes the unit of comparison for latency, errors, and route changes.

Alert on customer impact

Avoid paging on internal signals that have no user consequence. A better alert says that p95 latency for the checkout API exceeded its threshold in two regions after a specific release.