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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15514) Single (or small number) of Column Family(ies) in Mutation optimization
Date Tue, 22 Mar 2016 04:18:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15205758#comment-15205758
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ramkrishna.s.vasudevan commented on HBASE-15514:
------------------------------------------------

Better to convert all these as subtasks. 
So familyMap has to do a clone() every time. That is generating lot of garbage. But I don't
think we can avoid that copy if a Map with byte[] is used. 

> Single (or small number) of Column Family(ies) in Mutation optimization
> -----------------------------------------------------------------------
>
>                 Key: HBASE-15514
>                 URL: https://issues.apache.org/jira/browse/HBASE-15514
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance
>            Reporter: Vladimir Rodionov
>            Assignee: Vladimir Rodionov
>
> familyMap in Mutation class is TreeMap<byte[], List<Cell>>. Overhead of TreeMap
- 48 bytes, TreeMap$Entry - 40 bytes. 



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