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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (CASSANDRA-1968) Increase JVM young generation size
Date Fri, 21 Jan 2011 14:37:47 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12984752#action_12984752
] 

Jonathan Ellis edited comment on CASSANDRA-1968 at 1/21/11 9:37 AM:
--------------------------------------------------------------------

Young gen collection always compacts (part of the reason it's a STW phase).

      was (Author: jbellis):
    Young gen compaction always compacts (part of the reason it's a STW phase).
  
> 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, 1968_v2.txt
>
>   Original Estimate: 4h
>  Remaining Estimate: 4h
>
> Increasing the young generation size has a profound effect on performance and cpu utilization.
 We should set it explicitly.

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