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Posted to dev@kafka.apache.org by "Jason Gustafson (JIRA)" <ji...@apache.org> on 2016/04/14 02:52:25 UTC

[jira] [Created] (KAFKA-3556) Improve group coordinator metrics

Jason Gustafson created KAFKA-3556:
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             Summary: Improve group coordinator metrics
                 Key: KAFKA-3556
                 URL: https://issues.apache.org/jira/browse/KAFKA-3556
             Project: Kafka
          Issue Type: Improvement
            Reporter: Jason Gustafson


We currently don't have many metrics to track the behavior of the group coordinator (especially with respect to the new consumer). On a quick pass, I only saw a couple gauges in GroupMetadataManager for the number of groups and the number of cached offsets. Here are some interesting metrics that may be worth tracking:

1. Session timeout rate
2. Rebalance latency/rate
3. Commit latency/rate
4. Average group size
5. Size of metadata cache

Some of these may also be interesting to track per group.



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