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https://issues.apache.org/jira/browse/HIVE-3153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421023#comment-13421023
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Owen O'Malley commented on HIVE-3153:
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I just posted this as https://reviews.facebook.net/D4299 .
> Release codecs and output streams between flushes of RCFile
> -----------------------------------------------------------
>
> Key: HIVE-3153
> URL: https://issues.apache.org/jira/browse/HIVE-3153
> Project: Hive
> Issue Type: Improvement
> Components: Compression
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Attachments: hive-3153.patch
>
>
> Currently, RCFile writer holds a compression codec per a file and a
> compression output stream per a column. Especially for queries that use
> dynamic partitions this quickly consumes a lot of memory.
> I'd like flushRecords to get a codec from the pool and create the compression
> output stream in flushRecords.
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