Producer pushes; consumer pops. If producer > consumer, queue fills and blocks.

What you're seeing

A bounded queue between producer and consumer absorbs short-term rate mismatches. If producer sustained rate > consumer rate, the queue fills. Then producers block (or drop messages).

This is the queueing-theory core of every backpressure system: web servers, message brokers, stream processors, network buffers. Set queue capacity = (acceptable latency × consumer rate).

★ KEY TAKEAWAY
If producer rate > consumer rate, the queue fills. With bounded queue + blocking, producers throttle. With dropping, you lose messages.
▶ WHAT TO TRY
  • Slide producer rate higher than consumer.
  • Watch the queue fill, then block ratio rise.
  • This is the queueing-theory model behind every backpressure system.
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