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https://issues.apache.org/jira/browse/PHOENIX-7310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17891080#comment-17891080
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David Manning commented on PHOENIX-7310:
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It looks like https://issues.apache.org/jira/browse/HBASE-28302 may be helpful
here, since that gives an indication of how much query time was spent waiting
on loads from the FS.
> Add block bytes to our scan metrics
> -----------------------------------
>
> Key: PHOENIX-7310
> URL: https://issues.apache.org/jira/browse/PHOENIX-7310
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Tanuj Khurana
> Assignee: Palash Chauhan
> Priority: Major
>
> https://issues.apache.org/jira/browse/HBASE-27532 introduced tracking block
> bytes read in a given scan request. This will be very useful information for
> us when diagnosing query latency related performance issues.
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