[jira] [Updated] (KAFKA-4838) Export buffer cache metrics in JMX

["Ismael Juma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-4838?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ismael Juma updated KAFKA-4838:
-------------------------------
    Fix Version/s:     (was: 0.11.0.0)

> Export buffer cache metrics in JMX
> ----------------------------------
>
>                 Key: KAFKA-4838
>                 URL: https://issues.apache.org/jira/browse/KAFKA-4838
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>    Affects Versions: 0.10.2.0
>            Reporter: Eno Thereska
>            Priority: Minor
>              Labels: needs-kip
>
> Currently we log certain cache metrics, but don't export those via JMX, e.g., in ThreadCache.flush() we have:
> log.debug("Thread {} cache stats on flush: #puts={}, #gets={}, #evicts={}, #flushes={}",name, puts(), gets(), evicts(), flushes());
> We should export the hits, misses etc as metrics (with a DEBUG recording level). 



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