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From "james chien (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KAFKA-6498) Add RocksDB statistics via Streams metrics
Date Wed, 07 Feb 2018 10:11:00 GMT

    [ https://issues.apache.org/jira/browse/KAFKA-6498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16355257#comment-16355257
] 

james chien commented on KAFKA-6498:
------------------------------------

[~guozhang] Now I familiar with kafka metrics, so I want to confirm the goals, the following
two points are my thinking about to be resolved.

1) For currency, we enumerate all of metrics but not to let user select specific metrics directly,
so we have to add this.

2) Design a new interface to allow user manually add more `rocksDB metrics` as you mentioned
above in a custom way.

If both of two are right, I will be making a KIP proposing.

> Add RocksDB statistics via Streams metrics
> ------------------------------------------
>
>                 Key: KAFKA-6498
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6498
>             Project: Kafka
>          Issue Type: Improvement
>          Components: metrics, streams
>            Reporter: Guozhang Wang
>            Assignee: james chien
>            Priority: Major
>              Labels: needs-kip
>
> RocksDB's own stats can be programmatically exposed via {{Options.statistics()}} and
the JNI `Statistics` has indeed implemented many useful settings already. However these stats
are not exposed directly via Streams today and hence for any users who wants to get access
to them they have to manually interact with the underlying RocksDB directly, not through Streams.
> We should expose such stats via Streams metrics programmatically for users to investigate
them without trying to access the rocksDB directly.



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