RabbitMQ - Performance Tuning
Given a consumer with prefetch count set to 3, and it has 2 unacknowledged messages, how many more messages can RabbitMQ deliver to it before waiting for acknowledgments?
Given a consumer with prefetch count set to 3, and it has 2 unacknowledged messages, how many more messages can RabbitMQ deliver to it before waiting for acknowledgments?
medium📝 Command Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand prefetch count meaning
Prefetch count 3 means max 3 unacknowledged messages allowed.Step 2: Calculate remaining allowed messages
2 unacknowledged messages means 2 slots used, so 1 slot remains for delivery.Final Answer:
1 -> Option CQuick Check:
Prefetch 3 - 2 unacked = 1 message allowed [OK]
Quick Trick: Prefetch minus unacked = messages allowed [OK]
Common Mistakes:
MISTAKES- Counting acknowledged messages as unacknowledged
- Assuming prefetch is total messages delivered
- Ignoring current unacknowledged count
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