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https://issues.apache.org/jira/browse/CASSANDRA-8075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14165322#comment-14165322
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T Jake Luciani commented on CASSANDRA-8075:
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Remove the request thread pool used in netty. Also ideally remove the read
stage thread pool
> Make netty pipeline fully async
> -------------------------------
>
> Key: CASSANDRA-8075
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8075
> Project: Cassandra
> Issue Type: Improvement
> Reporter: T Jake Luciani
> Labels: performance
> Fix For: 3.0
>
>
> Related to CASSANDRA-5239. Netty does much better if we remove the request
> thread pool jump.
> Here is a benchmark of our netty pipeline returning a static value (so no
> actual cassandra processing). When the thread pool is removed we see a
> dramatic improvement.
> http://cstar.datastax.com/graph?stats=64ed5186-4e51-11e4-a8d5-bc764e04482c&metric=op_rate&operation=2_user&smoothing=1&show_aggregates=true&xmin=0&xmax=228.25&ymin=0&ymax=150217.1
> On my laptop using the async branch can match redis bench on the same machine
> ~160k ops/sec.
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