Kafka - Performance Tuning
Which Kafka consumer configuration helps reduce CPU usage by waiting for more data before returning?
Which Kafka consumer configuration helps reduce CPU usage by waiting for more data before returning?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Identify fetch.min.bytes purpose
This setting defines the minimum amount of data the broker should wait to accumulate before responding to a fetch request.Step 2: How it reduces CPU usage
By waiting for more data, the consumer reduces the number of fetch calls, lowering CPU overhead.Final Answer:
fetch.min.bytes -> Option AQuick Check:
fetch.min.bytes = wait for more data [OK]
Quick Trick: fetch.min.bytes delays fetch until enough data arrives [OK]
Common Mistakes:
- Confusing with max.poll.records which limits records per poll
- Thinking session.timeout.ms controls fetch size
- Assuming auto.offset.reset affects fetch timing
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