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From "Phil Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7486) Compare CMS and G1 pause times
Date Thu, 30 Apr 2015 06:12:08 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520926#comment-14520926
] 

Phil Yang commented on CASSANDRA-7486:
--------------------------------------

Another small question :)
Since many performance improvements were made to G1 in JDK 8 and its update releases, do we
need to have a propose for jdk7 users especially its early versions to update to jdk8's latest
version?

And I find a JEP that "Make G1 the default garbage collector on 32- and 64-bit server configurations."
in jdk9. See http://openjdk.java.net/jeps/248 if you have not heard about it.

> 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: Shawn Kumar
>             Fix For: 2.1.x
>
>
> 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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