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https://issues.apache.org/jira/browse/HBASE-8635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13670717#comment-13670717
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Jimmy Xiang commented on HBASE-8635:
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Attached a patch. It changed the meaning of
"hbase.hregionserver.prefetcher.resultsize.max" from the actual bytes to the
percentage. Didn't change the parameter name. Added a check to make sure the
value is between 0 and 1. The default is 0.1. The max heap size is calculated
only once in HRegionServer to save some time, although it could change
according to the java doc.
> 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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