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https://issues.apache.org/jira/browse/HBASE-4027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067930#comment-13067930
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Li Pi commented on HBASE-4027:
------------------------------
I'm gonna upload a PDF of benchmark results, but results are interesting.
Running HBase standalone, with a small enough dataset so that all files are in
local FS cache, the SlabCache substantially outperforms the FS Cache, even if
checksumming is disabled.
Compression is disabled as well.
> 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, slabcachepatchv2.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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