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https://issues.apache.org/jira/browse/PHOENIX-4674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Taylor updated PHOENIX-4674:
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Attachment: PHOENIX-4674.patch
> Incorrect stats if data size is less than guidepost width
> ---------------------------------------------------------
>
> Key: PHOENIX-4674
> URL: https://issues.apache.org/jira/browse/PHOENIX-4674
> Project: Phoenix
> Issue Type: Bug
> Reporter: Abhishek Singh Chouhan
> Assignee: Abhishek Singh Chouhan
> Priority: Major
> Attachments: PHOENIX-4674.patch
>
>
> For a small table, lets say with a single region < guidepost width, the stats
> after running update statistics can be way off. This is because we get an
> empty guidepost for the region and in BaseResultIterators we end up
> estimating the #rows as guidepostwidth/estimated row size of the table. For a
> table having <100 rows and guidepost width size of 100 mb, if the estimated
> row size is 100 bytes we end up estimating a million rows.
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