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https://issues.apache.org/jira/browse/CASSANDRA-6726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14102889#comment-14102889
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Jonathan Ellis commented on CASSANDRA-6726:
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bq. I'd be inclined to include this patch in 2.1.1, otherwise we're unlikely to
see much benefit from it, as I fully expect the new file format to not use
these classes at all
It would have to be a pretty large gain to justify potentially destabilizing
2.1 after all the effort we've put into QA for 2.1.0.
So I vote we either table this now and not sink more time into it, or if you
think it's going to be a 20% win or more then we can benchmark it first.
> Recycle CompressedRandomAccessReader/RandomAccessReader buffers independently
> of their owners, and move them off-heap when possible
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-6726
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6726
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Benedict
> Assignee: Branimir Lambov
> Priority: Minor
> Labels: performance
> Fix For: 3.0
>
> Attachments: cassandra-6726.patch
>
>
> Whilst CRAR and RAR are pooled, we could and probably should pool the buffers
> independently, so that they are not tied to a specific sstable. It may be
> possible to move the RAR buffer off-heap, and the CRAR sometimes (e.g. Snappy
> may possibly support off-heap buffers)
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