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https://issues.apache.org/jira/browse/DRILL-1370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14162654#comment-14162654
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Timothy Chen commented on DRILL-1370:
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Is there a suggested solution for this?
> Improve fragment staging
> ------------------------
>
> Key: DRILL-1370
> URL: https://issues.apache.org/jira/browse/DRILL-1370
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Flow
> Reporter: Jacques Nadeau
> Assignee: Steven Phillips
> Fix For: 0.6.0
>
>
> Drill optimistically executes all major fragments of a query. In some
> situations, this greedy behavior is too optimistic, which causes portions of
> the query to swamp the IO path too early, starving earlier phases of the
> query. Our RPC backpressure should help manage this. However, with a high
> level of parallelization, the back pressure is too lenient.
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