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Date: Tue, 3 Sep 2013 15:04:52 +0000 (UTC)
From: "Jonathan Hsieh (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12666193.1377811199712.71597.1378220692009@arcas>
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Subject: [jira] [Commented] (HBASE-9383) Have Cell interface extend HeapSize
 interface
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    [ https://issues.apache.org/jira/browse/HBASE-9383?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756683#comment-13756683 ] 

Jonathan Hsieh commented on HBASE-9383:
---------------------------------------

I punted on this because I wasn't sure how far the encoded cells are percolated through the RS.  I assume the heap size of the KV is used for memstore/buffer cache accounting.  are prefixtree cells present in the memstore? is encoded data present in the block cache or are the expanded?

for prefixtree heapsize, it would make sense to count the pointers, and separately count the shared prefixpool.
                
> Have Cell interface extend HeapSize interface
> ---------------------------------------------
>
>                 Key: HBASE-9383
>                 URL: https://issues.apache.org/jira/browse/HBASE-9383
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 0.96.0
>            Reporter: Jonathan Hsieh
>
> From the review of HBASE-9359. 
> bq. Stack: Cell should implement HeapSize?  That sounds right.
> bq. Ram: +1 for Cell extending HeapSize.
> bq. Jon: I'll look into Cell extending HeapSize as a follow on.  It doesn't interfere with the signature and if a older 0.96 client talks to a 0.96.1 rs that has the change, it won't matter.

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