[
https://issues.apache.org/jira/browse/CASSANDRA-10403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938181#comment-14938181
]
Joshua McKenzie edited comment on CASSANDRA-10403 at 9/30/15 6:09 PM:
----------------------------------------------------------------------
-The debate here isn't between "Do we consider G1 or disregard G1 entirely as
the general case", but rather "Do we use CMS or G1 as our default GC for 3.0,
keeping the settings for the alternative available in our configuration files
for users to swap between easily".-
Edit: missed the "general case" phrase. To that point, I haven't heard of
actual data showing what the general case is for C* usage is in the wild
regarding heap size. I would expect that large heap deployments will be
disproportionately reflected in the memories of people in the field since CMS
causes pain at that point.
[~enigmacurry]: did we ever get that 100x test run to complete successfully?
Before we determine whether Paulo should go fully down this rabbit-hole pre 3.0
releasing, I'd like that data point since we invested some effort into getting
that running already.
Edit:
was (Author: joshuamckenzie):
The debate here isn't between "Do we consider G1 or disregard G1 entirely", but
rather "Do we use CMS or G1 as our default GC for 3.0, keeping the settings for
the alternative available in our configuration files for users to swap between
easily".
[~enigmacurry]: did we ever get that 100x test run to complete successfully?
Before we determine whether Paulo should go fully down this rabbit-hole pre 3.0
releasing, I'd like that data point since we invested some effort into getting
that running already.
> Consider reverting to CMS GC on 3.0
> -----------------------------------
>
> Key: CASSANDRA-10403
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10403
> Project: Cassandra
> Issue Type: Improvement
> Components: Config
> Reporter: Joshua McKenzie
> Assignee: Paulo Motta
> Fix For: 3.0.0 rc2
>
>
> Reference discussion on CASSANDRA-7486.
> For smaller heap sizes G1 appears to have some throughput/latency issues when
> compared to CMS. With our default max heap size at 8G on 3.0, there's a
> strong argument to be made for having CMS as the default for the 3.0 release.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
