Hi,
I've started playing with Kafka_2.10-0.8.2.1 (a cluster of 3 VM nodes). I found a strange behaviour: Inbound throughput was about 60 thousand messages per second for a partition with 50 partitions. But after adding topics with 950 partitions total, the performance dropped under 25 thousand messages per second, even if the 950 new partitions were unused and empty. In other words: a simple existence of empty unused partitions can drop Kafka performance to less than 50 %. Has anybody else observed such Kafka behaviour? Does anybody have an explanation for this? Regards, Pavel
