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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-23843) Improve key evictions in VectorGroupByOperator
Date Mon, 03 Aug 2020 15:35:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23843?focusedWorklogId=465755&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-465755
]

ASF GitHub Bot logged work on HIVE-23843:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Aug/20 15:34
            Start Date: 03/Aug/20 15:34
    Worklog Time Spent: 10m 
      Work Description: kgyrtkirk closed pull request #1250:
URL: https://github.com/apache/hive/pull/1250


   


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 465755)
    Time Spent: 2h 40m  (was: 2.5h)

> Improve key evictions in VectorGroupByOperator
> ----------------------------------------------
>
>                 Key: HIVE-23843
>                 URL: https://issues.apache.org/jira/browse/HIVE-23843
>             Project: Hive
>          Issue Type: Improvement
>          Components: Hive
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> Keys in {{mapKeysAggregationBuffers}} are evicted in random order. Tasks also get into
GC issues when multiple keys are involved in groupbys. It would be good to provide an option
to have LRU based eviction for mapKeysAggregationBuffers.



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