[Solved] Given this Kafka producer config snippet:buffer.memory=33554432 batch.size=16384 linger.ms=5 What happens if the producer tries to send messages faster than the buffer can hold? | Kafka

Kafka - Performance Tuning

Given this Kafka producer config snippet:

buffer.memory=33554432
batch.size=16384
linger.ms=5

What happens if the producer tries to send messages faster than the buffer can hold?

AThe producer blocks until buffer space is available

BMessages are dropped silently

CThe producer throws an exception immediately

DMessages are sent without buffering

Step-by-Step Solution

Solution:

Step 1: Understand buffer.memory and batch.size roles
The buffer.memory limits total buffer size; batch.size limits batch size. If buffer is full, the producer must wait.
Step 2: Behavior when buffer is full
By default, the producer blocks (up to max.block.ms) until buffer space frees up; it does not drop messages or throw immediately.
Final Answer:
The producer blocks until buffer space is available -> Option A
Quick Check:
Full buffer causes blocking, not dropping [OK]

Quick Trick: Full buffer causes producer to block, not drop messages [OK]

Common Mistakes:

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