[jira] [Created] (IMPALA-5985) Limit number of plan fragments with Admission Control

["Peter Ebert (JIRA)" <ji...@apache.org>]

Peter Ebert created IMPALA-5985:
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             Summary: Limit number of plan fragments with Admission Control
                 Key: IMPALA-5985
                 URL: https://issues.apache.org/jira/browse/IMPALA-5985
             Project: IMPALA
          Issue Type: New Feature
            Reporter: Peter Ebert


There are some individual 'complex' or 'bad' queries that may not be blocked by Admission Control based on memory limits alone.  For some of these queries the number of fragments for a query can be an good indicator of how complex and demanding on the hardware the query will be (especially as it relates to the # of backend connections).

Being able to limit on a per pool and/or query basis for # of fragments would be helpful in blocking these queries from being run.

E.g.: Pool limited to 2000 fragments total, max of 500 per individual query.






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