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https://issues.apache.org/jira/browse/HBASE-4027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067992#comment-13067992
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Ted Yu commented on HBASE-4027:
-------------------------------
Why is the handling below different from that in cacheBlock(String blockName,
ByteBuffer buf, boolean inMemory) ?
{code}
public void cacheBlock(String blockName, ByteBuffer buf) {
// onHeapCache.cacheBlock(blockName, buf);
{code}
Overall, more javadoc would help others grasp the functionality for each class.
> 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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