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https://issues.apache.org/jira/browse/PHOENIX-5123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16761438#comment-16761438
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Lars Hofhansl commented on PHOENIX-5123:
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Actually lemme use Bytes.SIZEOF_INT instead of 4. But the rest should be good.
> Avoid using MappedByteBuffers for server side GROUP BY
> ------------------------------------------------------
>
> Key: PHOENIX-5123
> URL: https://issues.apache.org/jira/browse/PHOENIX-5123
> Project: Phoenix
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Priority: Major
> Attachments: 5123-4.x-W.I.P.txt, 5123-4.x-v1.txt
>
>
> Like PHOENIX-5120 but for GROUP BY.
> Solution is a bit more tricky, since outline for sorting the access here is
> truly random.
> [~apurtell] suggests to perhaps just use a RandomAccessFile for this.
> (I'm not sure that uses under the hood, though)
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