Tim Armstrong has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/16057 )

Change subject: WIP - IMPALA-9382: part 2/2: aggregate profiles sent to 
coordinator
......................................................................


Patch Set 6:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/16057/6/be/src/runtime/coordinator-backend-state.h
File be/src/runtime/coordinator-backend-state.h:

http://gerrit.cloudera.org:8080/#/c/16057/6/be/src/runtime/coordinator-backend-state.h@284
PS6, Line 284:     /// When --gen_experimental_profile=true, this contains a 
copy of the full instance
I got true/false switched here.

We also need to be clearer about *why* it works to merge the partial profile 
into the aggregated profile. It is quite brittle but does minimise code changes 
for the moment. I think we need to document in the AggregatedProfile::Update() 
methods that existing counters and other entities don't get removed if they are 
updated with a profile that doesn't contain them.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ic680cbfe94c939c2a8fad9d0943034ed058c6bca
Gerrit-Change-Number: 16057
Gerrit-PatchSet: 6
Gerrit-Owner: Tim Armstrong <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-Comment-Date: Thu, 11 Jun 2020 22:39:53 +0000
Gerrit-HasComments: Yes

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