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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12524) Ozone: Record number of keys scanned and hinted for getRangeKVs call
Date Mon, 25 Sep 2017 22:53:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179903#comment-16179903
] 

Anu Engineer commented on HDFS-12524:
-------------------------------------

 one quick question. I am not sure what the hinted stands for? is it keys where the prefix
matched? 


> Ozone: Record number of keys scanned and hinted for getRangeKVs call
> --------------------------------------------------------------------
>
>                 Key: HDFS-12524
>                 URL: https://issues.apache.org/jira/browse/HDFS-12524
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: logging, ozone
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>            Priority: Minor
>              Labels: ozoneMerge, performance
>         Attachments: HDFS-12524-HDFS-7240.001.patch
>
>
> Add debug logging to record number of keys scanned and hinted for {{getRangeKVs}} calls,
this will be helpful to debug performance issues since {{getRangeKVs}} is often the place
where we get the lag.



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