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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-7486) Compare CMS and G1 pause times
Date Tue, 01 Jul 2014 18:04:25 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-7486?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-7486:
--------------------------------------

    Description: 
See http://www.slideshare.net/MonicaBeckwith/garbage-first-garbage-collector-g1-gc-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.)

  was:
See http://www.slideshare.net/MonicaBeckwith/garbage-first-garbage-collector-g1-gc-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.  (NB this is off
by default but needs to be part of the test.)


> Compare CMS and G1 pause times
> ------------------------------
>
>                 Key: CASSANDRA-7486
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7486
>             Project: Cassandra
>          Issue Type: Test
>          Components: Config
>            Reporter: Jonathan Ellis
>            Assignee: Ryan McGuire
>             Fix For: 2.1.0
>
>
> See http://www.slideshare.net/MonicaBeckwith/garbage-first-garbage-collector-g1-gc-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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