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From "Nicolas Liochon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9976) Don't create duplicated TableName objects
Date Mon, 18 Nov 2013 14:03:22 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13825330#comment-13825330
] 

Nicolas Liochon commented on HBASE-9976:
----------------------------------------

v4 seems ok locally. I've tested it with all the other jiras & in progress: yourkit does
not show any blocked thread anymore, with two or twenty clients.
The difference seems to come from all the valueOf that check the cache content before doing
any ByteBuffer to byte array creation.

> Don't create duplicated TableName objects
> -----------------------------------------
>
>                 Key: HBASE-9976
>                 URL: https://issues.apache.org/jira/browse/HBASE-9976
>             Project: HBase
>          Issue Type: Bug
>          Components: Client, regionserver
>    Affects Versions: 0.98.0, 0.96.0
>            Reporter: Nicolas Liochon
>            Assignee: Nicolas Liochon
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: 9976.v1.patch, 9976.v4.patch
>
>
> A profiling show that the table name is reponsible for 25% of the memory needed to keep
the region locations. As well, comparisons will be faster if two identical table names are
a single java object.



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