[Solved] If Kafka's fetch.min.bytes is set to 50000, what happens when a consumer requests data? — Ans: Consumer waits until at least 50KB of data is available before receiving | Kafka

Kafka - Performance Tuning

If Kafka's fetch.min.bytes is set to 50000, what happens when a consumer requests data?

AConsumer fetches data only if broker CPU usage is low

BConsumer immediately receives any available data regardless of size

CConsumer fetches exactly 50 messages each time

DConsumer waits until at least 50KB of data is available before receiving

Step-by-Step Solution

Solution:

Step 1: Understand fetch.min.bytes meaning
This setting tells Kafka to wait until minimum bytes are ready before responding.
Step 2: Apply to consumer behavior
The consumer will wait until 50KB data is ready to optimize network usage.
Final Answer:
Consumer waits until at least 50KB of data is available before receiving -> Option D
Quick Check:
fetch.min.bytes controls consumer wait = D [OK]

Quick Trick: fetch.min.bytes sets minimum data size before consumer fetch [OK]

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If Kafka's fetch.min.bytes is set to 50000, what happens when a consumer requests data?