[jira] [Updated] (HBASE-4027) Enable direct byte buffers LruBlockCache

["Li Pi (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-4027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Li Pi updated HBASE-4027:
-------------------------

    Attachment: slabcachepatch.diff

Slab allocated cache for hbase. 80% of the speed of the original lrublockcache.

> 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: slabcachepatch.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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