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https://issues.apache.org/jira/browse/HBASE-15543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15216578#comment-15216578
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Vladimir Rodionov commented on HBASE-15543:
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{quote}
The compaction scanner also has caching enabled.
{quote}
Why? Must be off.
{quote}
Is the reported 28% creation of new Cell or new Cell reference when the Cell is
being made against a backing BB that is offheap from BucketCache?
{quote}
On heap. Both byte array and object are allocated.
> HFileScannerImpl.getCell() allocates cell object on every call
> --------------------------------------------------------------
>
> Key: HBASE-15543
> URL: https://issues.apache.org/jira/browse/HBASE-15543
> Project: HBase
> Issue Type: Sub-task
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
>
> This accounts for 28% of memory allocation in compaction thread.
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