Hi,

I am trying to test Kafka performance in my setup using kafka-perf scripts 
provided by Kafka.

I see a behavior in my Kafka cluster in case of acks=1, which I am unable to 
understand.

My run works as expected for sometime, but after that suddenly "fetcher lag" 
starts to increase exponentially and Producer/consumer throughput decreases 
significantly. CPU consumption of broker also comes down a lot.

Any suggestions what could be the culprit here, is it because of the fetcher 
lag? If yes, why does fetcher lag starts increasing suddenly after sometime?


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Regards,
Prateek Kohli

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