Hello Riza Suminto, Csaba Ringhofer, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/18325
to look at the new patch set (#3).
Change subject: IMPALA-11185: Reuse orc row batch in the scanner life-cycle
......................................................................
IMPALA-11185: Reuse orc row batch in the scanner life-cycle
In HdfsOrcScanner::AssembleRows(), we always re-create a
orc::ColumnVectorBatch. The ideal pattern is reusing the batch and only
destroying it when the scanner is closed.
This save half of the scanner time in some TPCH queries. See the flame
graph in JIRA description.
Tests:
- Run CORE test
Change-Id: I03887ed94af2ff03d67cd00c79375c734a75af62
---
M be/src/exec/hdfs-orc-scanner.cc
1 file changed, 2 insertions(+), 5 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/25/18325/3
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I03887ed94af2ff03d67cd00c79375c734a75af62
Gerrit-Change-Number: 18325
Gerrit-PatchSet: 3
Gerrit-Owner: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
