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#postgresql
2 posts
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[Messenger Load-Testing, Part 2] There Was a Deadlock Hiding in AI-Generated Code — How We Replaced `unreadCount` with `lastReadAt`
42.8% HTTP error rate, 9 minutes into a load test, at 12% of the target TPS. The culprit was a single updateMany line written during AI-assisted coding.
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[Messenger Load-Testing, Part 1] Building a Reusable Load-Test Environment — Make-based IaC, Observability, and Auth Seeding
How many TPS can a messenger's send API survive, and where exactly does it break? A 7-node mirror of production, rebuilt on demand from a single Makefile target.
