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Posted to commits@cassandra.apache.org by "Jonathan Shook (JIRA)" <ji...@apache.org> on 2015/09/28 18:14:04 UTC

[jira] [Commented] (CASSANDRA-10403) Consider reverting to CMS GC on 3.0

    [ https://issues.apache.org/jira/browse/CASSANDRA-10403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14933505#comment-14933505 ] 

Jonathan Shook commented on CASSANDRA-10403:
--------------------------------------------

Can we get some G1 tests with a 24+G heap to see if it's worth making this machine-specific? The notion of "commodity" changes with time. The settings need to adapt if possible.



> Consider reverting to CMS GC on 3.0
> -----------------------------------
>
>                 Key: CASSANDRA-10403
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10403
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Config
>            Reporter: Joshua McKenzie
>             Fix For: 3.0.0 rc2
>
>
> Reference discussion on CASSANDRA-7486.
> For smaller heap sizes G1 appears to have some throughput/latency issues when compared to CMS. With our default max heap size at 8G on 3.0, there's a strong argument to be made for having CMS as the default for the 3.0 release.



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