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https://issues.apache.org/jira/browse/IMPALA-15418?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on IMPALA-15418 started by Arnab Karmakar.
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> Compute query-relative and slowest-thread time per plan node
> ------------------------------------------------------------
>
> Key: IMPALA-15418
> URL: https://issues.apache.org/jira/browse/IMPALA-15418
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Arnab Karmakar
> Assignee: Arnab Karmakar
> Priority: Major
>
> {{local_time_frac_}} is relative to a node's own total time, not the query.
> Add a query-relative fraction ({{{}query_time_frac{}}}) per plan node on the
> coordinator, and define its denominator for parallel instances. For operators
> with work outside the instance thread (non-MT scanner threads, disk I/O
> threads), derive a slowest-thread time signal from existing counters.
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