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https://issues.apache.org/jira/browse/IMPALA-12091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17716920#comment-17716920
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Riza Suminto commented on IMPALA-12091:
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Filed a gerrit review here: https://gerrit.cloudera.org/c/19807/
> Control scan fragment parallelism by its processing cost
> --------------------------------------------------------
>
> Key: IMPALA-12091
> URL: https://issues.apache.org/jira/browse/IMPALA-12091
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 4.2.0
> Reporter: Riza Suminto
> Assignee: Riza Suminto
> Priority: Major
>
> Impala still rely on MT_DOP option to decide parallelism of scan fragment
> when query runs with COMPUTE_PROCESSING_COST=1. Planner should decide scan
> parallelism by its processing cost instead of fixed count dictated by MT_DOP.
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