[jira] [Created] (KAFKA-5178) Potential Performance Degradation in Kafka Producer when using Multiple Threads

["Ben Stopford (JIRA)" <ji...@apache.org>]

Ben Stopford created KAFKA-5178:
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             Summary: Potential Performance Degradation in Kafka Producer when using Multiple Threads
                 Key: KAFKA-5178
                 URL: https://issues.apache.org/jira/browse/KAFKA-5178
             Project: Kafka
          Issue Type: Bug
            Reporter: Ben Stopford
         Attachments: TestDetails.pdf

There is evidence that the Kafka Producer drops performance as we increase the number of threads using it. 

This is based on some benchmarking done in the community. I have not independently validated these results. Details of the test setup attached.
...

*Effect of Shared KafkaProducer across threads*
 
Kafka documentation recommend using the KafkaProducer across multiple worker threads.
 
||#Producers||#Consumers||#Topics||#Partitions per topic||RoundTrip Throughput (events/sec)||Approx Broker Events (Millions/sec)||
|1|1|1|1|268,312|0.5|
|4|4|4|4|759,186|1.5|
|8|8|8|8|640,738|1.2|
|8|8|8|16|847,314|1.7|
|8|8|8|48|17,791|0.035|
|16|16|16|64|5,997|0.01|
 
Something appears to be wrong here, with 48 and 64 partitions the shared KafkaProducer struggled to the point that performance became quite bad.
 




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