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Challenge

Preserve per-key queue order when workers hit slow tail spikes

Producers publish per-key ordered jobs. Half take 1 µs, half take 4 ms.

A 1 ms visibility timeout redelivers slow jobs while still running, breaking per-key order (orderingViolated). Tune the queue.

  • Goodput

    ≥ 99.0%

    every seed

  • Budget

    $500/mo

    ★★ at ≤ $400

  • Traffic

    1,000 req/s (constant)

    deadline 40 ms

★★★ adds 1 variant failure timeline.