Hi, Using flight recorder, we have observed high CPU usage of CRC32 (kafka.utils.Crc32.update()) on Kafka broker. It uses as much as 25% of CPU on an instance. Tracking down stack trace, this method is invoked by ReplicaFetcherThread.
Is there any tuning we can do to reduce this? Also on the topic of CPU utilization, we observed that overall CPU utilization is proportional to AllTopicsBytesInPerSec metric. Does this metric include incoming replication traffic? Thanks, Allen
