RabbitMQ caps at 2000-4000 messages/second per core by default

RabbitMQ begins queuing and blocking at 2,000-4,000 messages per second per core under default settings. Without proper tuning, the broker becomes the bottleneck before workers saturate.

Benchmark RabbitMQ throughput independently before scaling workers. Tune broker settings to handle target message rates. For RabbitMQ configurations, properly tuned systems support millions of messages per minute.