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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6234) Add metrics for native protocols
Date Thu, 28 Nov 2013 14:32:36 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13834865#comment-13834865
] 

Sylvain Lebresne commented on CASSANDRA-6234:
---------------------------------------------

I don't think the rejection handler can ever be called since MATPE uses an unbounded queue
under the hood. That being said, MATPE does potentially block tasks by design, but unfortunately
I don't think there's a way to know how many tasks are blocked nor how many were blocked.
Might be something to request on the Netty but for now, let's just use a raw ThreadPoolMetrics
and leave blocked counts (current and total) out of it.

> Add metrics for native protocols
> --------------------------------
>
>                 Key: CASSANDRA-6234
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6234
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Adam Hattrell
>            Assignee: Mikhail Stepura
>         Attachments: CASSANDRA-2.0-6234.patch, Oracle_Java_Mission_Control_2013-11-22_15-50-09.png
>
>
> It would be very useful to expose metrics related to the native protocol.
> Initially I have a user that would like to be able to monitor the usage of native transport
threads.



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