title: Is it possible to decrease min.insync.replicas?
body: <p>I'm planning to run a Kafka cluster in a production environment. Before deploying the cluster, I try to find the best configuration to ensure HA and data consistency.</p>
  <p>I read in the official doc that it is not possible to reduce the partition replication factor, but what about the <code>min.insync.replicas</code>? When I decrease the value on a test environment I don't see any differences when I look at topics description. After changing the value from 3 to 2, I still have 3 ISR. Is it because it's a min value or because the configuration change is not taken into account?</p>