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From "Li Pi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4027) Enable direct byte buffers LruBlockCache
Date Thu, 28 Jul 2011 17:15:10 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072424#comment-13072424
] 

Li Pi commented on HBASE-4027:
------------------------------

Dataset is small - I wanted to guarantee it remained in FS cache. I'll make it larger.

> Enable direct byte buffers LruBlockCache
> ----------------------------------------
>
>                 Key: HBASE-4027
>                 URL: https://issues.apache.org/jira/browse/HBASE-4027
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jason Rutherglen
>            Assignee: Li Pi
>            Priority: Minor
>         Attachments: 4027-v5.diff, HBase-4027.pdf, slabcachepatch.diff, slabcachepatchv2.diff,
slabcachepatchv3.1.diff, slabcachepatchv3.2.diff, slabcachepatchv3.diff, slabcachepatchv4.5.diff,
slabcachepatchv4.diff
>
>
> Java offers the creation of direct byte buffers which are allocated outside of the heap.
> They need to be manually free'd, which can be accomplished using an documented {{clean}}
method.
> The feature will be optional.  After implementing, we can benchmark for differences in
speed and garbage collection observances.

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