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From "Brock Noland (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-7975) HS2 memory optimization: Internalizing instance fields of Thrift-generated metastore API classes
Date Fri, 05 Sep 2014 15:08:29 GMT

    [ https://issues.apache.org/jira/browse/HIVE-7975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123027#comment-14123027
] 

Brock Noland commented on HIVE-7975:
------------------------------------

Looks great [~wilbur.yang], nice work!! +1

> HS2 memory optimization: Internalizing instance fields of Thrift-generated metastore
API classes
> ------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-7975
>                 URL: https://issues.apache.org/jira/browse/HIVE-7975
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Wilbur Yang
>            Assignee: Wilbur Yang
>             Fix For: 0.14.0
>
>         Attachments: HIVE-7975-doc.pdf, HIVE-7975.1.patch, HIVE-7975.2.patch
>
>
> We should internalize the String-based instance fields of the metastore API classes FieldSchema,
Partition, SerDeInfo, and StorageDescriptor in order to save memory. In a test environment
with data consisting of about 1800 partitions, the proposed changes are able to save about
24% of old generation memory during a complex query. See details in the attached document.



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