Tim Armstrong has posted comments on this change.

Change subject: Revert "IMPALA-2473: reduce scanner memory usage"
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Patch Set 1:

(4 comments)

I think we should only backport the changes to hdfs-parquet-scanner.cc and 
nested-types-tpch.test.

http://gerrit.cloudera.org:8080/#/c/3429/1/be/src/exec/hdfs-parquet-scanner.cc
File be/src/exec/hdfs-parquet-scanner.cc:

Line 1646
I think this is the only change we need to backport.


http://gerrit.cloudera.org:8080/#/c/3429/1/be/src/exec/hdfs-scanner.cc
File be/src/exec/hdfs-scanner.cc:

Line 173
Don't need to revert this change.


http://gerrit.cloudera.org:8080/#/c/3429/1/be/src/exec/hdfs-table-sink.cc
File be/src/exec/hdfs-table-sink.cc:

Let's not revert the changes in this file.


http://gerrit.cloudera.org:8080/#/c/3429/1/be/src/runtime/row-batch.h
File be/src/runtime/row-batch.h:

Line 139:   bool AtCapacity(MemPool* tuple_pool) {
We don't want to backport this change.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I55a94363840c2b3804ed070c23f57f2117b4fab3
Gerrit-PatchSet: 1
Gerrit-Project: Impala
Gerrit-Branch: cdh5-2.5.0_5.7.x
Gerrit-Owner: Huaisi Xu <[email protected]>
Gerrit-Reviewer: Huaisi Xu <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: Yes

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