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https://issues.apache.org/jira/browse/PHOENIX-7670?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Palash Chauhan resolved PHOENIX-7670.
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Resolution: Fixed
> Region level thread pool for uncovered index to scan data table rows
> --------------------------------------------------------------------
>
> Key: PHOENIX-7670
> URL: https://issues.apache.org/jira/browse/PHOENIX-7670
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Palash Chauhan
> Assignee: Palash Chauhan
> Priority: Major
> Fix For: 5.3.0
>
>
> Every scan on an uncovered index creates a new thread pool to scan data table
> rows. This can hurt performance due to the overhead of creating and closing
> the thread pool with each new scanner. We can keep a region level thread pool
> which can be used during uncovered index scans to scan data table rows. This
> can greatly benefit applications consuming change records via CDC since that
> uses an uncovered index.
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