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From "Peter Schuller (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1968) Increase JVM young generation size
Date Tue, 11 Jan 2011 23:52:45 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12980446#action_12980446
] 

Peter Schuller commented on CASSANDRA-1968:
-------------------------------------------

Attaching a version that does that calculation. Not yet intended for direct inclusions; some
of the numbers are arbitrary and maybe it should be cleaned up a bit.

Also, correcting myself on JDK 1.7: With CMS it's apparantly MaxGCMinorPauseMillis for young-gen
(MaxGCPauseMillis). Very brief testing did not work well but probably because I failed to
tweak some other setting to allow it to dynamically size properly. Nevermind, since 1.7 isn't
out yet.



> Increase JVM young generation size
> ----------------------------------
>
>                 Key: CASSANDRA-1968
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1968
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 0.7.0
>            Reporter: Brandon Williams
>            Assignee: Brandon Williams
>             Fix For: 0.7.1
>
>         Attachments: 1968.txt
>
>
> Increasing the young generation size has a profound effect on performance and cpu utilization.
 We should set it explicitly.

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