AI article
Our System Crashed at 14:22: It Wasn't the Database
Community description: A 5-minute cache TTL was actually burning API tokens under concurrent load. Here is the exact post-mortem and code fix.
Dev.to | Sep 14, 2026 | Cogumellum
Automated excerpt
TL;DR: During peak concurrent load, our 5-minute cache unexpectedly evicted keys early due to lock contention. Last Tuesday, our primary streaming endpoint started throwing sporadic timeouts. p99 Latency: jumped from 280ms to 3,400ms. 504 Error Rate: reached 4. 2% across an 18-minute window. Production implementation: gateway de alta resiliência e medição de tokens para LLMs.
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