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https://issues.apache.org/jira/browse/CASSANDRA-8897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14564702#comment-14564702
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Benedict commented on CASSANDRA-8897:
-------------------------------------

Yes, it could just be the benefit of direct memory usage. Let's not worry about 
this, to be honest. With or without these numbers, this is a superior design, 
and the benefits will compound as we reduce the size of the buffers in the 
follow up ticket CASSANDRA-8894

> Remove FileCacheService, instead pooling the buffers
> ----------------------------------------------------
>
>                 Key: CASSANDRA-8897
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8897
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>            Assignee: Stefania
>             Fix For: 3.x
>
>         Attachments: 8897.yaml, 9240_test_results.txt, 
> snapshot-1431582436640-cpu-backtraces.png, 
> snapshot-1431582436640-cpu-calltree-compression-8897.nps, 
> snapshot-1431582436640-cpu-calltree-compression-trunk.nps
>
>
> After CASSANDRA-8893, a RAR will be a very lightweight object and will not 
> need caching, so we can eliminate this cache entirely. Instead we should have 
> a pool of buffers that are page-aligned.



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