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From "Phabricator (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4068) Size of aggregation buffer which uses non-primitive type is not estimated correctly
Date Mon, 04 Mar 2013 01:12:11 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Phabricator updated HIVE-4068:
------------------------------

    Attachment: HIVE-4068.D8859.4.patch

navis updated the revision "HIVE-4068 [jira] Size of aggregation buffer which uses non-primitive
type is not estimated correctly".

  Addressed comment

Reviewers: JIRA

REVISION DETAIL
  https://reviews.facebook.net/D8859

CHANGE SINCE LAST DIFF
  https://reviews.facebook.net/D8859?vs=28593&id=29133#toc

AFFECTED FILES
  builtins/src/org/apache/hive/builtins/UDAFUnionMap.java
  pdk/scripts/build-plugin.xml
  ql/src/java/org/apache/hadoop/hive/ql/exec/GroupByOperator.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFAverage.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFBridge.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCollectSet.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFComputeStats.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFContextNGrams.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCorrelation.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCount.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCovariance.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFEWAHBitmap.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFEvaluator.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFHistogramNumeric.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFPercentileApprox.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFSum.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFVariance.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFnGrams.java
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/NumericHistogram.java
  ql/src/java/org/apache/hadoop/hive/ql/util/JavaDataModel.java

To: JIRA, navis
Cc: njain

                
> Size of aggregation buffer which uses non-primitive type is not estimated correctly
> -----------------------------------------------------------------------------------
>
>                 Key: HIVE-4068
>                 URL: https://issues.apache.org/jira/browse/HIVE-4068
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Navis
>            Assignee: Navis
>            Priority: Minor
>         Attachments: HIVE-4068.D8859.1.patch, HIVE-4068.D8859.2.patch, HIVE-4068.D8859.3.patch,
HIVE-4068.D8859.4.patch
>
>
> Currently, hive assumes an aggregation buffer which holds a map is occupying just 256
byte (fixed). If it's bigger than that in real, OutOfMemoryError can be thrown (especially
for >1k buffer). 
> workaround : set hive.map.aggr.hash.percentmemory=<smaller value than default(0.5)>

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