[jira] [Assigned] (KAFKA-3811) Introduce Kafka Streams metrics recording levels

["aarti gupta (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KAFKA-3811?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

aarti gupta reassigned KAFKA-3811:
----------------------------------

    Assignee: aarti gupta  (was: Guozhang Wang)

> Introduce Kafka Streams metrics recording levels
> ------------------------------------------------
>
>                 Key: KAFKA-3811
>                 URL: https://issues.apache.org/jira/browse/KAFKA-3811
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: Greg Fodor
>            Assignee: aarti gupta
>
> Follow-up from the discussions here:
> https://github.com/apache/kafka/pull/1447
> https://issues.apache.org/jira/browse/KAFKA-3769
> The proposal is to introduce configuration to control the granularity/volumes of metrics emitted by Kafka Streams jobs, since the per-record level metrics introduce non-trivial overhead and are possibly less useful once a job has been optimized. 
> Proposal from guozhangwang:
> level0 (stream thread global): per-record process / punctuate latency, commit latency, poll latency, etc
> level1 (per processor node, and per state store): IO latency, per-record .. latency, forward throughput, etc.
> And by default we only turn on level0.



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