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https://issues.apache.org/jira/browse/IMPALA-13233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17866807#comment-17866807
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Surya Hebbar commented on IMPALA-13233:
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There are two possible ways to display the phases parallelly.
# With borders on all sides of each instance's phases
# With borders only at the beginning and end of each instance's phases
Example for both of these methods has been attached here.
For large profiles, 1st method produces rectangles filled with black lines
throughout the diagram, resulting in poor visuals. As this is not desired, I
think the 2nd method is the way to go.
[^no_borders_6a477079d908e96d_03bfee1d00000000_timeline.html]
[^with_borders_6a477079d908e96d_03bfee1d00000000_timeline.html]
[^large_profile_no_borders_334307144a03276f_e184c3ea00000000_timeline.html]
[^large_profile_with_borders_cd4932da98382a06_40c2221b00000000_timeline.html]
Note:
* Filenames starting with 'no_borders' is referring to the 2nd method.
* The large profile example has been rendered from a 430MB query profile.
> 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: Improvement
> Reporter: Surya Hebbar
> Assignee: Surya Hebbar
> Priority: Major
> Attachments:
> large_profile_no_borders_334307144a03276f_e184c3ea00000000_timeline.html,
> large_profile_with_borders_cd4932da98382a06_40c2221b00000000_timeline.html,
> no_borders_6a477079d908e96d_03bfee1d00000000_timeline.html,
> 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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