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Postmortem: GraphQL 16 N+1 Problem Caused 3-Second Page Loads for 1 Hour

DEV Community·ANKUSH CHOUDHARY JOHAL·6 months ago
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At 14:17 UTC on March 12, 2024, our production dashboard alerted on a p99 page load time of 3.2 seconds for our product catalog, up from a baseline of 110ms. The root cause? A silent regression in GraphQL 16’s default resolver behavior that triggered a catastrophic N+1 query storm affecting 12,000 active users for 47 minutes.

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