Kafka Memory consumption, when there is no traffic

[Gulnaz2021]

Hi,

After deploying a 3 node Kafka 2.4.0 cluster, with Strimzi operator in Kubernetes, we've observed that the memory consumption increases for a while and then stabilizes with that much consumed memory. Find below the screenshot for the same. And there is no traffic sent to the cluster.


And another observation is that,

1. sent traffic to the cluster - produced and consumed messages.
2. updated the Kafka broker pods, with the JVM and they have been restarted, but the zookeeper pods didn't restart,
   the memory consumption increased to certain limit and was stabilized after that, but the memory consumed by broker pod 0, was more as compared to broker 1 and 2.
   Can I please get some help in this regard. Is it the expected behavior of Kafka or how it is.