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Posted to commits@cassandra.apache.org by "Brandon Williams (JIRA)" <ji...@apache.org> on 2011/01/11 22:38:47 UTC

[jira] Updated: (CASSANDRA-1968) Increase JVM young generation size

     [ https://issues.apache.org/jira/browse/CASSANDRA-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Brandon Williams updated CASSANDRA-1968:
----------------------------------------

    Attachment: 1968.txt

Patch to automatically set the young generation to 1/4 the heap, which yields a 80-150% increase on both reads and writes in my testing.

> 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
>             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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