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https://issues.apache.org/jira/browse/CASSANDRA-1651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12926424#action_12926424
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Stu Hood commented on CASSANDRA-1651:
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> 1. ... everything else only lasts for the duration of a read which is small
> numbers of ms at most
> 2. ... so we can dismiss this scenario as uninteresting
Memtables?
> 3. we have to read it (or wrap it) the sequence into a new buffer to do the
> cache lookup
No, it doesn't need to be a new buffer. In fact, it can be the same buffer for
every single key/name/value that is read from disk.
> Improve read performance by using byte array slabs
> --------------------------------------------------
>
> Key: CASSANDRA-1651
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1651
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Priority: Minor
> Fix For: 0.7.0
>
> Attachments: 1651_v1.txt
>
>
> Now that the code has switched to byte buffers internally, it should be
> possible to improve read performance by reducing the number of byte array
> allocations.
> This patch accomplishes this by and re-using sections of a larger byte array
> slab.
> I've benchmarked it locally and seen a slight improvement on reads, a larger
> scale benchmark should be performed.
> Also the size of a slab can be configured in cassandra.yaml
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