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https://issues.apache.org/jira/browse/CARBONDATA-3670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17303118#comment-17303118
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Ajantha Bhat commented on CARBONDATA-3670:
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Already handled in 2.0 from https://github.com/apache/carbondata/pull/3638
> Support compress offheap columnpage directly, avoding a copy of data from
> offhead to heap when compressed.
> ----------------------------------------------------------------------------------------------------------
>
> Key: CARBONDATA-3670
> URL: https://issues.apache.org/jira/browse/CARBONDATA-3670
> Project: CarbonData
> Issue Type: Wish
> Components: core
> Affects Versions: 2.0.0
> Reporter: Xingjun Hao
> Priority: Minor
> Fix For: 2.1.1
>
> Time Spent: 4h 10m
> Remaining Estimate: 0h
>
> When writing data, the columnpages are stored on the offheap, the pages will
> be compressed to save storage cost. Now, in the compression processing, the
> data will be copied from the offheap to the heap before compressed, which
> leads to heavier GC overhead compared with compress offhead directly.
> To sum up, we support compress offheap columnpage directly, avoding a copy of
> data from offhead to heap when compressed.
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