Riza Suminto has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/19807 )

Change subject: IMPALA-12091: Control scan parallelism by its processing cost
......................................................................


Patch Set 1:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/19807/1//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/19807/1//COMMIT_MSG@18
PS1, Line 18: NUM_SCANNER_THREADS
Should create new query option for this specific purpose rather than reuse  
NUM_SCANNER_THREADS.


http://gerrit.cloudera.org:8080/#/c/19807/1/fe/src/main/java/org/apache/impala/planner/PlanNode.java
File fe/src/main/java/org/apache/impala/planner/PlanNode.java:

http://gerrit.cloudera.org:8080/#/c/19807/1/fe/src/main/java/org/apache/impala/planner/PlanNode.java@a1036
PS1, Line 1036:
I need to look around if there is another reference to MT_DOP like this in 
frontend code. They should be replaced with 
analyzer.getMaxParallelismPerNode(). Backend code should get checked as well.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: If948e45455275d9a61a6cd5d6a30a8b98a7c729a
Gerrit-Change-Number: 19807
Gerrit-PatchSet: 1
Gerrit-Owner: Riza Suminto <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Kurt Deschler <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Reviewer: Wenzhe Zhou <[email protected]>
Gerrit-Comment-Date: Wed, 26 Apr 2023 21:06:11 +0000
Gerrit-HasComments: Yes

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