blog/Tail Latency & System Behavior

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Tail Latency & System Behavior

Runnable Java experiments on the failure patterns that show up under real load: tail latency, queueing, hedged requests, coordinated omission, backpressure, and SLO engineering. Deterministic outputs, checked-in CSVs, reproducible on any machine.

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first post2026-05-31

latest2026-05-31

total read~9 min

All Structured Concurrency

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012026-05-31
Why Average Latency Lies
A deterministic Java simulation where baseline p99=34ms becomes fan-out p99=597ms without changing the downstream latency sampler. Average latency is structurally incapable of catching that tail pain.
9 min