Mostafa Mokhtar created IMPALA-6852:

             Summary: Add a section to the query profile covering number of 
fragments and total bytes scanned per host
                 Key: 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

This message was sent by Atlassian JIRA

Reply via email to