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https://issues.apache.org/jira/browse/CASSANDRA-18027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17632620#comment-17632620
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Michael Semb Wever edited comment on CASSANDRA-18027 at 11/12/22 12:13 PM:
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bq. Why not use the JVM default, 200ms? We do, and it works well.
>From a wide range of benchmarking synthetic tests and production clusters,
>300ms is seen as the best (safe) default. I do not have the data to support
>this evidence, it has not remained or is confidential. We saw tuning it away
>from 300ms gives very little, and it should not be seen as an important flag
>to be tuning in any C* cluster. XX:NewSize is a far more important place to
>start, often followed by InitiatingHeapOccupancyPercent.
was (Author: michaelsembwever):
bq. Why not use the JVM default, 200ms? We do, and it works well.
>From a wide range of benchmarking synthetic tests and production clusters,
>300ms is seen as the best (safe) default. I do not have the data to support
>this evidence, it has not remained or is confidential. We saw tuning it away
>from 300ms gives very little, and it should not be seen an important flag to
>be tuning in any C* cluster. XX:NewSize is a far more important place to
>start, often followed by InitiatingHeapOccupancyPercent.
> Use G1GC as default
> -------------------
>
> Key: CASSANDRA-18027
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18027
> Project: Cassandra
> Issue Type: Task
> Components: Local/Config
> Reporter: Michael Semb Wever
> Assignee: Michael Semb Wever
> Priority: Normal
>
> G1GC is well battle tested now, and the recommended configuration for most
> users. CMS can work well on smaller heaps but requires more tuning, initially
> and over time. G1GC just works. CMS was deprecated in JDK 9.
> Patch at
> https://github.com/apache/cassandra/compare/trunk...thelastpickle:cassandra:mck/7486/trunk
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