Michael Smith has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/22926 )

Change subject: IMPALA-14574: Lower memory estimate by analyzing 
PipelineMembership
......................................................................


Patch Set 15: Code-Review+1

(2 comments)

http://gerrit.cloudera.org:8080/#/c/22926/14//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/22926/14//COMMIT_MSG@92
PS14, Line 92:   scale 10. No major regression is observed.
> I thought no spill happen before and after the patch. But I check again jus
It'd be nice to look at whether there's something unique about query 78. Maybe 
we're under-estimating minimum memory for an operator.


http://gerrit.cloudera.org:8080/#/c/22926/14/fe/src/main/java/org/apache/impala/planner/PipelineBasedMemEstimator.java
File fe/src/main/java/org/apache/impala/planner/PipelineBasedMemEstimator.java:

http://gerrit.cloudera.org:8080/#/c/22926/14/fe/src/main/java/org/apache/impala/planner/PipelineBasedMemEstimator.java@60
PS14, Line 60:
> The map value, PipeMem object, memorize the originating fragment where the
Ack



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Iba4f40993d8360bfdc1eb592a626e285dfed1627
Gerrit-Change-Number: 22926
Gerrit-PatchSet: 15
Gerrit-Owner: Riza Suminto <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Comment-Date: Wed, 07 Jan 2026 01:14:27 +0000
Gerrit-HasComments: Yes

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