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https://issues.apache.org/jira/browse/PHOENIX-6986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17735660#comment-17735660
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Istvan Toth commented on PHOENIX-6986:
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We could call it _phoenix.query.global.server.merge.enable_ with a default
value of "true".
> Add property to disable server merges for hinted uncovered indexes
> ------------------------------------------------------------------
>
> Key: PHOENIX-6986
> URL: https://issues.apache.org/jira/browse/PHOENIX-6986
> Project: Phoenix
> Issue Type: Improvement
> Components: core
> Reporter: Istvan Toth
> Priority: Major
>
> The new server merge query plan can perform worse than the old skip-join-scan
> plan.
> Add a property to completely disable it.
> This should help with migrating workloads to the new version, without having
> to verify if server merge performs well, and having add hints to disable it
> where needed.
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