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https://issues.apache.org/jira/browse/HBASE-15005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15070205#comment-15070205
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Elliott Clark commented on HBASE-15005:
---------------------------------------

For encoded column families the row could be in one array that is shared 
between lots of different kv's. The value since it's never encoded is more 
likely to point to something that dominates how much memory is being kept alive.

> Use value array in computing block length for 1.2 and 1.3
> ---------------------------------------------------------
>
>                 Key: HBASE-15005
>                 URL: https://issues.apache.org/jira/browse/HBASE-15005
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 1.2.0, 1.3.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>             Fix For: 1.2.0, 1.3.0
>
>         Attachments: HBASE-15005.patch
>
>
> Follow on to HBASE-14978



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