I am running a producer latency test. When using 92 producers in 92 physical node publishing to 4 brokers, the latency is slightly lower than using 8 brokers, I am using 8 partitions for the topic.
I have rerun the test and it gives me the same result, the 4 brokers scenario still has lower latency than the 8 brokers scenarios. It is weird because I tested 1broker, 2 brokers, 4 brokers, 8 brokers, 16 brokers and 32 brokers. For the rest of the case the latency decreases as the number of brokers increase. 4 brokers/8 brokers is the only pair that doesn't satisfy this rule. What could be the cause? I am using a 200 bytes message, the test let each producer publishes 500k messages to a given topic. Every test run when I change the number of brokers, I use a new topic. Thanks for any advices.
