[Solved] In RabbitMQ, what is the effect of setting prefetch_count to 0 for a consumer? — Ans: The consumer will receive unlimited messages without waiting for acknowledgments | RabbitMQ

RabbitMQ - Performance Tuning

In RabbitMQ, what is the effect of setting prefetch_count to 0 for a consumer?

AThe consumer will automatically reject all messages

BThe consumer will not receive any messages until prefetch_count is increased

CThe consumer will only receive one message at a time

DThe consumer will receive unlimited messages without waiting for acknowledgments

Step-by-Step Solution

Solution:

Step 1: Understand prefetch_count=0
Setting prefetch_count to 0 disables the limit on unacknowledged messages.
Step 2: Effect on message delivery
The consumer can receive an unlimited number of messages without waiting for acknowledgments, which may cause overload.
Final Answer:
The consumer will receive unlimited messages without waiting for acknowledgments -> Option D
Quick Check:
Prefetch 0 means no limit on unacked messages [OK]

Quick Trick: Prefetch 0 means unlimited unacked messages [OK]

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In RabbitMQ, what is the effect of setting prefetch_count to 0 for a consumer?