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From "Ron Kuris (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9526) Provide a JMX hook to monitor phi values in the FailureDetector
Date Thu, 25 Jun 2015 18:24:05 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14601672#comment-14601672
] 

Ron Kuris commented on CASSANDRA-9526:
--------------------------------------

[~brandon.williams] I haven't submitted anything before, so I'm wondering what I need to do
to get this into Cassandra. Do you want a PR instead of the patches here?

> Provide a JMX hook to monitor phi values in the FailureDetector
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-9526
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9526
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Ron Kuris
>             Fix For: 2.0.x
>
>         Attachments: Monitor-Phi-JMX.patch, Phi-Log-Debug-When-Close.patch, Tiny-Race-Condition.patch
>
>
> phi_convict_threshold can be tuned, but there's currently no way to monitor the phi values
to see if you're getting close.
> The attached patch adds the ability to get these values via JMX.



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