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https://issues.apache.org/jira/browse/IMPALA-13233?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Surya Hebbar closed IMPALA-13233.
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> Represent phases of each instance separately on the webUI's query timeline
> --------------------------------------------------------------------------
>
> Key: IMPALA-13233
> URL: https://issues.apache.org/jira/browse/IMPALA-13233
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Surya Hebbar
> Assignee: Surya Hebbar
> Priority: Major
> Attachments: bucketed_phases_with_tooltips.png,
> large_no_of_instances_parallell_representation.png,
> large_profile_no_borders_334307144a03276f_e184c3ea00000000_timeline.html,
> large_profile_with_borders_cd4932da98382a06_40c2221b00000000_timeline.html,
> no_borders_6a477079d908e96d_03bfee1d00000000_timeline.html,
> small_no_of_instances_parallell_representation.png,
> timeline_representation.png,
> with_borders_6a477079d908e96d_03bfee1d00000000_timeline.html
>
>
> Currently, in the query timeline, each instance's phases are represented
> together in a single bar with dividers to show when each phase has finished.
> This results in several problems as follows.
> * If phases of multiple instances end at the same time, it is often hard or
> impossible to distinguish.
> * Huge profiles with a large number of instances produce mostly black lines,
> which would not be desired by the user.
> * In the case of multiple instances, each phase overlaps the next, hence
> blocking the user from realizing that other instances have started with the
> next phase.
> * The correlation between representation and the actual values is less.
> So, it would be preferable to represent each instance's phases separately.
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