Canary release — glossary
TL;DR
Routing a small slice of traffic to a new version before full promotion.
Key facts
- Term
- Canary release
TL;DR
A canary release routes a small percentage of traffic to a new version before full promotion — limiting blast radius if the release regresses.
Metrics to watch during a canary
- Error rate and p99 latency vs baseline
- PHP-FPM pool utilization
- Queue backlog depth
Reflex correlates these signals with deploy markers automatically.