A Kafka producer has batch.size=32768 and compression.type=snappy, but messages are still sent uncompressed. What is a likely cause?

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Kafka - Performance Tuning

A Kafka producer has batch.size=32768 and compression.type=snappy, but messages are still sent uncompressed. What is a likely cause?

AThe producer is sending single messages larger than batch.size, so compression is skipped

BThe <code>compression.type</code> value 'snappy' is misspelled and ignored

CThe broker does not support snappy compression, so producer disables it

DThe <code>batch.size</code> is too large to enable compression

Step-by-Step Solution

Solution:

Step 1: Understand compression behavior
Kafka compresses batches, but if a single message exceeds batch.size, it is sent immediately without compression.
Step 2: Check message size vs batch.size
If messages are larger than 32 KB, compression won't be applied.
Final Answer:
The producer is sending single messages larger than batch.size, so compression is skipped -> Option A
Quick Check:
Large single messages bypass batch compression [OK]

Quick Trick: Single large messages skip compression [OK]

Common Mistakes:

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