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https://issues.apache.org/jira/browse/PHOENIX-539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14204498#comment-14204498
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James Taylor commented on PHOENIX-539:
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I've filed PHOENIX-1428 and PHOENIX-1429, as there are certain queries now that
will spin up too many threads.
> Implement parallel scanner that does not spool to disk
> ------------------------------------------------------
>
> Key: PHOENIX-539
> URL: https://issues.apache.org/jira/browse/PHOENIX-539
> Project: Phoenix
> Issue Type: Task
> Reporter: James Taylor
> Assignee: Gabriel Reid
> Fix For: 5.0.0, 3.1, 4.1
>
> Attachments: PHOENIX-539.1.patch, PHOENIX-539.patch
>
>
> In scenarios where a LIMIT is not present on a non aggregate query that will
> return a lot of results, Phoenix spools the results to disk. This is less
> than ideal in these situations. @larsh has created a very good and relatively
> simple implementation that is queue based to replace this.
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