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From "Marcus Eriksson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5361) Enable ThreadLocal allocation in the JVM
Date Wed, 20 Mar 2013 09:11:15 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607428#comment-13607428
] 

Marcus Eriksson commented on CASSANDRA-5361:
--------------------------------------------

it seems +UseTLAB is on by default
                
> Enable ThreadLocal allocation in the JVM
> ----------------------------------------
>
>                 Key: CASSANDRA-5361
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5361
>             Project: Cassandra
>          Issue Type: Improvement
>         Environment: JDK 6
>            Reporter: T Jake Luciani
>            Assignee: Ryan McGuire
>             Fix For: 1.2.4
>
>
> Adding -XX:+UseTLAB to cassandra-env.sh yields a ~15% read performance boost.
> Works with usual stress tool but also in our production.
> It enables thread local allocation of new objects which makes sense for SEDA based systems.

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