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https://issues.apache.org/jira/browse/CASSANDRA-17998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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T Jake Luciani updated CASSANDRA-17998:
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Status: Ready to Commit (was: Changes Suggested)
> Mutation Serialization Caching
> ------------------------------
>
> Key: CASSANDRA-17998
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17998
> Project: Cassandra
> Issue Type: Improvement
> Components: Messaging/Internode
> Reporter: T Jake Luciani
> Assignee: T Jake Luciani
> Priority: Normal
> Fix For: 4.x
>
>
> A performance change that adds mutation serialization caching to avoid
> re-serializing the mutation for commitlog and nodes twice.
> * Cached serialization for storage proxy and local commitlog
> * Cached deserialization for messaging service and local commitlog
> This yields a non trivial perf gain (~7-10%) and latency drop (median)
> [https://tjake.github.io/other/cached-mutations-report.html]
>
> The cached buffer is stored by MessagingService version to avoid being used
> by differing nodes during upgrades.
> Also, It avoids caching mutations larger than a threshold to avoid GC issues.
>
> GH PR: https://github.com/apache/cassandra/pull/1954
>
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