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From "Vladimir Rodionov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15543) HFileScannerImpl.getCell() allocates cell object on every call
Date Tue, 29 Mar 2016 18:31:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15216578#comment-15216578
] 

Vladimir Rodionov commented on HBASE-15543:
-------------------------------------------

{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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