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https://issues.apache.org/jira/browse/HIVE-13057?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mohit Sabharwal updated HIVE-13057:
-----------------------------------
Attachment: HIVE-13057.patch
> Remove duplicate copies of TableDesc property values in PartitionDesc
> ---------------------------------------------------------------------
>
> Key: HIVE-13057
> URL: https://issues.apache.org/jira/browse/HIVE-13057
> Project: Hive
> Issue Type: Bug
> Reporter: Mohit Sabharwal
> Assignee: Mohit Sabharwal
> Attachments: HIVE-13057.patch
>
>
> For a partitioned table, each PartitionDesc has a copy of corresponding
> TableDesc.
> While TableDesc is mutable and hence cannot be interned, it's property values
> can be.
> For a simple select on a table with 100K partitions, this cut total number of
> String instances by ~65%.
> Most replicated strings were location, serde, input/output format, column,
> types, table name, etc.
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