153 Queue Workers and Backpressure
153 Queue Workers and Backpressure
Queue systems decouple producer and consumer rates, but only if capacity and failure behavior are explicit.
Throughput Model
producer -> queue(buffer) -> workers -> dependency
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+-> backpressure when fullKey Design Levers
- Queue size (latency vs memory).
- Worker count (parallelism vs contention).
- Retry strategy (durability vs duplicate work risk).
Failure Handling
Not all failed jobs should be retried equally. Distinguish transient failures from poison messages and route accordingly.
Operational Goal
Backpressure should degrade gracefully under overload rather than silently dropping data or exhausting memory.