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https://issues.apache.org/jira/browse/CASSANDRA-1968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12980426#action_12980426
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Jonathan Ellis commented on CASSANDRA-1968:
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bq. min(max_sensible_per_modern_cpu_core*num_cores, 1/4 heap size)
probably this, since new gen compaction is supposed to be parallelizable (not
sure how much this is true in practice).
> Increase JVM young generation size
> ----------------------------------
>
> Key: CASSANDRA-1968
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1968
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 0.7.0
> Reporter: Brandon Williams
> Assignee: Brandon Williams
> Fix For: 0.7.1
>
> Attachments: 1968.txt
>
>
> Increasing the young generation size has a profound effect on performance and
> cpu utilization. We should set it explicitly.
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