Mostafa Mokhtar created IMPALA-6852:
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Summary: Add a section to the query profile covering number of
fragments and total bytes scanned per host
Key: IMPALA-6852
URL: https://issues.apache.org/jira/browse/IMPALA-6852
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 2.13.0
Reporter: Mostafa Mokhtar
Assignee: Sailesh Mukil
Root causing performance issues usually comes down to skew in terms of work
done across hosts. Un-even assignment of fragments or bytes scanned per host is
a common.
Making this information readily available in the query profile will help
speedup RCA.
Proposal is to add two tables to the query profile that cover
* Number of fragments per host
* Number of bytes scanned per host
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