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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9526) Provide a JMX hook to monitor phi values in the FailureDetector
Date Mon, 19 Oct 2015 15:00:06 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14963424#comment-14963424
] 

Aleksey Yeschenko commented on CASSANDRA-9526:
----------------------------------------------

Committed as [3cd750012e0cf3b55442c036627fb032c29c16bc|https://github.com/apache/cassandra/commit/3cd750012e0cf3b55442c036627fb032c29c16bc]
to 2.2 and merged upwards, thank you.

Next time, though, would be good to have CI results for 3.0 (this time made an exception for
3.0, but wouldn't have done it for 2.1->2.2 merge).

> 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
>            Assignee: Ron Kuris
>              Labels: docs-impacting
>             Fix For: 2.2.4, 3.0.0
>
>         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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