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https://issues.apache.org/jira/browse/HBASE-4027?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Li Pi updated HBASE-4027:
-------------------------
Release Note:
Allows the enabling off an off heap cache in hbase. Set hbase.offheapcachesize
in hbase-site.xml
Then, uncomment the line in hbase-env.sh. Cache does a slab allocation model
similar to memcached.
Status: Patch Available (was: Open)
I'll do the writeup and pretty benchmarked graphs and stuff tomorrow.
> 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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