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Posted to jira@kafka.apache.org by "Ming Liu (Jira)" <ji...@apache.org> on 2021/04/24 17:18:00 UTC
[jira] [Created] (KAFKA-12713) Report broker/consumer fetch latency
more accurately
Ming Liu created KAFKA-12713:
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Summary: Report broker/consumer fetch latency more accurately
Key: KAFKA-12713
URL: https://issues.apache.org/jira/browse/KAFKA-12713
Project: Kafka
Issue Type: Bug
Reporter: Ming Liu
The fetch latency is an important metrics to monitor for the cluster performance. With ACK=ALL, the produce latency is affected primarily by broker fetch latency.
However, currently the reported fetch latency didn't reflect the true fetch latency because it sometimes need to stay in purgatory and wait for replica.fetch.wait.max.ms when data is not available. This greatly affect the real P50, P99 etc.
I like to propose a KIP to be able track the real fetch latency for both broker follower and consumer.
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