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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (CASSANDRA-9738) Migrate key-cache to be fully off-heap
Date Sat, 12 Nov 2016 09:47:58 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Stupp resolved CASSANDRA-9738.
-------------------------------------
       Resolution: Won't Fix
    Fix Version/s:     (was: 3.x)

Closed as won't-fix.

We already have CASSANDRA-11206 to handle large partitions and CASSANDRA-9754 is also making
progress. Both tickets make this one somehow superfluous.

> Migrate key-cache to be fully off-heap
> --------------------------------------
>
>                 Key: CASSANDRA-9738
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9738
>             Project: Cassandra
>          Issue Type: Sub-task
>            Reporter: Robert Stupp
>            Assignee: Robert Stupp
>
> Key cache still uses a concurrent map on-heap. This could go to off-heap and feels doable
now after CASSANDRA-8099.
> Evaluation should be done in advance based on a POC to prove that pure off-heap counter
cache buys a performance and/or gc-pressure improvement.
> In theory, elimination of on-heap management of the map should buy us some benefit.



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