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From "Tim Armstrong (Code Review)" <>
Subject [Impala-ASF-CR] PREVIEW: IMPALA-3208: max row size option
Date Wed, 09 Aug 2017 23:29:43 GMT
Tim Armstrong has uploaded a new patch set (#5).

Change subject: PREVIEW: IMPALA-3208: max_row_size option

PREVIEW: IMPALA-3208: max_row_size option

This is a preview because it is missing tests. I have manually tested
it and it is behaving it as expected so far.

Adds support for a "max_row_size" query option that instructs Impala
to reserve enough memory to process rows of the specified size. For
spilling operators, the planner reserves enough memory to process
rows of this size. The advantage of this compared to simply
specifying larger values for min_spillable_buffer_size and
default_spillable_buffer_size is that operators may be able to
handler larger rows without increasing the size of all their

This is implemented using the variable page size support added to
BufferedTupleStream in an earlier commit. The synopsis is that each
stream requires reservation for one default-sized page per read and
write iterator, and temporarily requires reservation for a max-sized
page when reading or writing larger pages. The max-sized write
reservation is released immediately after the row is appended and
the max-size read reservation is released after advancing to the
next row.

This means that in the aggs and joins we require one max-size read
buffer for the read stream and one max-size write buffer that can be
used to append a large value to any stream.

The sorter and analytic are simpler: there we simply use the max-sized
buffers for all pages in the stream.

Updated existing planner tests to reflect default max_row_size. Added
new planner tests to test the effect of the query option.

Added "set" test to check validation of query option.
* TODO: Add end-to-end tests exercising all operators with large rows
  with and without spilling.

Change-Id: Ic70f6dddbcef124bb4b329ffa2e42a74a1826570
M be/src/exec/
M be/src/exec/partitioned-aggregation-node.h
M be/src/exec/
M be/src/exec/partitioned-hash-join-builder.h
M be/src/exec/
M be/src/runtime/
M be/src/service/
M be/src/service/query-options.h
M common/thrift/ImpalaInternalService.thrift
M common/thrift/ImpalaService.thrift
M common/thrift/PlanNodes.thrift
M common/thrift/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
A fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/test/java/org/apache/impala/planner/
M testdata/workloads/functional-planner/queries/PlannerTest/constant-folding.test
M testdata/workloads/functional-planner/queries/PlannerTest/disable-codegen.test
M testdata/workloads/functional-planner/queries/PlannerTest/fk-pk-join-detection.test
A testdata/workloads/functional-planner/queries/PlannerTest/max-row-size.test
M testdata/workloads/functional-planner/queries/PlannerTest/mt-dop-validation.test
M testdata/workloads/functional-planner/queries/PlannerTest/resource-requirements.test
M testdata/workloads/functional-planner/queries/PlannerTest/spillable-buffer-sizing.test
M testdata/workloads/functional-planner/queries/PlannerTest/tablesample.test
M testdata/workloads/functional-query/queries/QueryTest/set.test
M testdata/workloads/functional-query/queries/QueryTest/spilling.test
31 files changed, 690 insertions(+), 150 deletions(-)

  git pull ssh:// refs/changes/29/7629/5
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ic70f6dddbcef124bb4b329ffa2e42a74a1826570
Gerrit-PatchSet: 5
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <>

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