Surya Hebbar created IMPALA-13233:
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Summary: Represent phases of each instance seperately on the 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
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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