Guozhang Wang created KAFKA-6498:
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             Summary: 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


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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