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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-8188) Avoid unnecessary row compare in StoreScanner
Date Sat, 23 Mar 2013 06:11:15 GMT

     [ https://issues.apache.org/jira/browse/HBASE-8188?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lars Hofhansl updated HBASE-8188:
---------------------------------

    Attachment: 8188-0.94.txt

0.94 patch.
I measure between 3-5% performance increase in my scenarios.
                
> Avoid unnecessary row compare in StoreScanner
> ---------------------------------------------
>
>                 Key: HBASE-8188
>                 URL: https://issues.apache.org/jira/browse/HBASE-8188
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>         Attachments: 8188-0.94.txt
>
>
> When scanner batching disable (which is the default) a row compare in StoreScanner avoided,
because only entire rows of data are requested.
> This provides a slight performance gain, especially for tall tables (and when all data
is in the cache)

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