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https://issues.apache.org/jira/browse/CASSANDRA-3674?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13176168#comment-13176168
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Radim Kolar commented on CASSANDRA-3674:
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if this command reports size of live objects on heap after GC then it is
somewhat usefull, because after doing GC in jconsole no size is printed after
finishing GC and you need to wait some time until heap graphs are refreshed.
> add nodetool explicitgc
> -----------------------
>
> Key: CASSANDRA-3674
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3674
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Peter Schuller
> Assignee: Peter Schuller
> Priority: Minor
> Attachments: CASSANDRA-3674-trunk.txt
>
>
> So that you can easily ask people "run nodetool explicitgc and paste the
> results".
> I'll file a separate JIRA suggesting that we ship with
> -XX:+ExplicitGCInvokesConcurrent by default.
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