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From "Phil Yang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-7486) Migrate to G1GC by default
Date Sun, 20 Sep 2015 05:32:07 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14877434#comment-14877434
] 

Phil Yang edited comment on CASSANDRA-7486 at 9/20/15 5:31 AM:
---------------------------------------------------------------

It seems that the max heap is still 8G in trunk so maybe it is unfair for G1. What is the
heap size of these tests?


was (Author: yangzhe1991):
It seems that the max heap is still 8G in trunk so may be it is unfair for G1. What is the
heap size of these tests? i

> Migrate to G1GC by default
> --------------------------
>
>                 Key: CASSANDRA-7486
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7486
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Config
>            Reporter: Jonathan Ellis
>            Assignee: Benedict
>             Fix For: 3.0 alpha 1
>
>
> See http://www.slideshare.net/MonicaBeckwith/garbage-first-garbage-collector-g1-7486gc-migration-to-expectations-and-advanced-tuning
and https://twitter.com/rbranson/status/482113561431265281
> May want to default 2.1 to G1.
> 2.1 is a different animal from 2.0 after moving most of memtables off heap.  Suspect
this will help G1 even more than CMS.  (NB this is off by default but needs to be part of
the test.)



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