[jira] [Created] (IMPALA-12056) Child queries could get scheduled on improper executor group sets

["Abhishek Rawat (Jira)" <ji...@apache.org>]

Abhishek Rawat created IMPALA-12056:
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             Summary: Child queries could get scheduled on improper executor group sets
                 Key: IMPALA-12056
                 URL: https://issues.apache.org/jira/browse/IMPALA-12056
             Project: IMPALA
          Issue Type: Bug
            Reporter: Abhishek Rawat


'Compute Stats' queries gets scheduled on the smallest executor group set since these queries don't do any real work. However their child queries also gets scheduled on the smallest executor group. This may not be ideal for cases where the child query does an NDV and Count on a big wide table. We should assign the executor group set for the children queries based on their planning estimates.

Today we see following message for the parent query, which. makes sense:
{code:java}
Verdict: Assign to first group because query is not auto-scalable {code}
as a side effect we see following message for child queries:
{code:java}
Verdict: query option REQUEST_POOL=root.group-set-small is set. Memory and cpu limit checking is skipped. {code}



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