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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8635) Define prefetcher.resultsize.max as percentage
Date Mon, 03 Jun 2013 17:37:22 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13673351#comment-13673351
] 

Jimmy Xiang commented on HBASE-8635:
------------------------------------

One choice is to disable prefetching by default, so that users can make their own decision
about when to turn it on and how much space it can use.
                
> Define prefetcher.resultsize.max as percentage
> ----------------------------------------------
>
>                 Key: HBASE-8635
>                 URL: https://issues.apache.org/jira/browse/HBASE-8635
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Jimmy Xiang
>            Priority: Minor
>         Attachments: trunk-8635.patch
>
>
> Currently "hbase.hregionserver.prefetcher.resultsize.max" defines global limit for prefetching.
> The default value is 256MB.
> It would be more flexible to define this measure as a percentage of the heap.

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