Alexey Serbin has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/16777 )

Change subject: KUDU-3108: fix invalid memory accesses in merge iterator
......................................................................


Patch Set 6:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/16777/6/src/kudu/common/generic_iterators.cc
File src/kudu/common/generic_iterators.cc:

http://gerrit.cloudera.org:8080/#/c/16777/6/src/kudu/common/generic_iterators.cc@556
PS6, Line 556:   typedef std::set<MergeIterState*, 
MergeIterStateSmallestMaxComparator> MergeStateOrderedSet;
> I tried getting this working with boost::intrusive::set<>, but ran into iss
If I'm not mistaken, for 'hotmaxes_' the choice of containers is broader than 
for 'hot_' because there isn't a requirement for ordered iteration in 
'hotmaxes_', right?

If so, then even std::priority_queue might be an option.  Maybe, it's even 
worth trying std::make_heap if it seems more optimal from the perspective of 
its usage in  MergeIterator::RefillHotHeap().

Does it makes sense or I'm missing something here?



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I8ec1cd3fd67ec4ea92a55b5b0ce555123748824d
Gerrit-Change-Number: 16777
Gerrit-PatchSet: 6
Gerrit-Owner: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Adar Lieber-Dembo <a...@apache.org>
Gerrit-Reviewer: Alexey Serbin <aser...@cloudera.com>
Gerrit-Reviewer: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Bankim Bhavsar <ban...@cloudera.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Tidy Bot (241)
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
Gerrit-Comment-Date: Thu, 26 Nov 2020 01:27:13 +0000
Gerrit-HasComments: Yes

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