Riza Suminto created IMPALA-12005:
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Summary: Explain executor group set selection criteria in query
profile
Key: IMPALA-12005
URL: https://issues.apache.org/jira/browse/IMPALA-12005
Project: IMPALA
Issue Type: Improvement
Components: Frontend
Affects Versions: Impala 4.2.0
Reporter: Riza Suminto
[IMPALA-10992|http://issues.cloudera.org/browse/IMPALA-10992] and
[IMPALA-11604|http://issues.cloudera.org/browse/IMPALA-11604] adds memory and
cpu constraint criteria for executor group set selection. We should explain
this selection criteria in query profile. Things that we should consider adding
to query profile:
* The effective degree of parallelism (EDoP) value that was used to calculate
fitness for a given group. Possibly some additional details about how we got to
that EDoP like the per fragment values.
* Per host memory estimate for that group.
* Reason for not choosing a given group (if any) - was it based on memory or
CPU, what thresholds were we comparing to, etc.
In the event of none executor group set is fit, the returned AnalysisException
also need to provide more context. Right now, only these are returned:
{code:java}
AnalysisException: The query does not fit any executor group sets. {code}
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