We noticed that the replication factor is six for *__consumer_offsets* and as we have been moving consumers over from zk to kf offsets latency for FetchFollower on the group coordinator for a busy consumer_group increases significantly (in hundreds of ms), but offset commit latency and cpu increase as well. This is on a 0.10.2.1 broker.
What are the performance implication of increasing the replication factor of a topic and how does this change for __consumer_offsets? What are effects of decreasing replication factor of __consumer_offsets, do we need to do anything special like stop all of our consumers while we change the replication factor of this special topic? I think that's our next step here is to decrease to the default of 3. Regards, Dennis Ordanov
