Hello Lars Volker, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/11575
to look at the new patch set (#17).
Change subject: IMPALA-6964: Track stats about column and page sizes in Parquet
reader
......................................................................
IMPALA-6964: Track stats about column and page sizes in Parquet reader
Adds the following new stats:
* ParquetCompressedPageSize - a summary (average, min, max) counter that
tracks the size of compressed pages read, if no compressed pages are
read then this counter is empty
* ParquetUncompressedPageSize - a summary counter that tracks the size
of uncompressed pages read, it is updated in two places: (1) when a
compressed page is de-compressed, and (2) when a page that is not
compressed is read
* ParquetCompressedDataReadPerColumn - a summary counter that tracks the
amount of compressed data read per column for a scan node
* ParquetUncompressedDataReadPerColumn - a summary counter that tracks
the amount of uncompressed data read per column for a scan node
The PerColumn counters are calculated by aggregating the number of bytes
read for each column across all scan ranges processed by a scan node.
Each sample in the counter is the size of a single column.
Here is an example of what the updated HDFS scan profile looks like:
- ParquetCompressedDataReadPerColumn: (Avg: 227.56 KB (233018) ;
Min: 225.14 KB (230540) ; Max: 229.98 KB (235496) ; Number of samples: 2)
- ParquetUncompressedDataReadPerColumn: (Avg: 227.96 KB (233426) ;
Min: 224.91 KB (230306) ; Max: 231.00 KB (236547) ; Number of samples: 2)
- ParquetCompressedPageSize: (Avg: 4.46 KB (4568) ; Min: 3.86 KB (3955) ;
Max: 5.19 KB (5315) ; Number of samples: 102)
- ParquetDecompressedPageSize: (Avg: 4.47 KB (4576) ; Min: 3.86 KB (3950)
; Max: 5.22 KB (5349) ; Number of samples: 102)
Testing:
* Added new tests to test_scanners.py that do some basic validation of
the new counters above
Change-Id: I322f9b324b6828df28e5caf79529085c43d7c817
---
M be/src/exec/hdfs-scan-node-base.cc
M be/src/exec/hdfs-scan-node-base.h
M be/src/exec/parquet/hdfs-parquet-scanner.cc
M be/src/exec/parquet/hdfs-parquet-scanner.h
M be/src/exec/parquet/parquet-column-readers.cc
M be/src/util/runtime-profile.cc
M tests/infra/test_utils.py
M tests/query_test/test_scanners.py
A tests/util/counters.py
M tests/util/parse_util.py
10 files changed, 320 insertions(+), 10 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/75/11575/17
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I322f9b324b6828df28e5caf79529085c43d7c817
Gerrit-Change-Number: 11575
Gerrit-PatchSet: 17
Gerrit-Owner: Sahil Takiar <stak...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Lars Volker <l...@cloudera.com>
Gerrit-Reviewer: Sahil Takiar <stak...@cloudera.com>
