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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15554) StoreFile$Writer.appendGeneralBloomFilter generates extra KV
Date Sat, 07 May 2016 07:00:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15275131#comment-15275131
] 

Anoop Sam John commented on HBASE-15554:
----------------------------------------

bq.For the ROWCOL case we need one copy for creating the key[] with ROW and COL and pass it
to the hash.
So this is the main thing which allocates memory area right?  The temp byte arrays.  So what
we avoid here?  No KeyValue object creation?  Did not go through the patch.

> StoreFile$Writer.appendGeneralBloomFilter generates extra KV
> ------------------------------------------------------------
>
>                 Key: HBASE-15554
>                 URL: https://issues.apache.org/jira/browse/HBASE-15554
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Performance
>            Reporter: Vladimir Rodionov
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15554.patch
>
>
> Accounts for 10% memory allocation in compaction thread when BloomFilterType is ROWCOL.



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