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https://issues.apache.org/jira/browse/CASSANDRA-9607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14595997#comment-14595997
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T Jake Luciani commented on CASSANDRA-9607:
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[~rstrickland] can you profile a node (with VisualVM) in both cases so we can 
see what it's busy working on? Just attach screenshots of the sorted profile 
results

> Get high load after upgrading from 2.1.3 to cassandra 2.1.6
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-9607
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9607
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: OS: 
> CentOS 6 * 4
> Ubuntu 14.04 * 2
> JDK: Oracle JDK 7, Oracle JDK 8
> VM: Azure VM Standard A3 * 6
> RAM: 7 GB
> Cores: 4
>            Reporter: Study Hsueh
>            Assignee: T Jake Luciani
>            Priority: Critical
>             Fix For: 2.1.x, 2.2.0 rc2
>
>         Attachments: cassandra.yaml, load.png, log.zip, schema.zip
>
>
> After upgrading cassandra version from 2.1.3 to 2.1.6, the average load of my 
> cassandra cluster grows from 0.x~1.x to 3.x~6.x. 
> What kind of additional information should I provide for this problem?



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