Vercel Cache Reason : distinguer MISS, BYPASS et STALE

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Le statut dit ce qui s’est passé, la raison explique pourquoi. Mesurez latence, charge et fraîcheur par raison.

Vercel Cache Reason : distinguer MISS, BYPASS et STALE
Cache Reason sépare les absences à froid, les contournements voulus et les erreurs de revalidation.
StatusReasonAction
MISSColdCheck prerender and lifetime
BYPASSCrawler / Draft ModeConfirm intentional bypass
STALERevalidation errorInvestigate origin while stale serves

Operational checklist

✓Group metrics by cache_reason

✓Separate latency, origin load, and freshness

✓Do not optimize intentional bypass as a miss

Official sources

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