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From "Dikang Gu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8398) Expose time spent waiting in thread pool queue
Date Wed, 30 Nov 2016 22:04:58 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8398?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15709932#comment-15709932
] 

Dikang Gu commented on CASSANDRA-8398:
--------------------------------------

Here is the patch, [~tjake], do you mind to take a look? Thanks!

|[patch | https://github.com/DikangGu/cassandra/commit/447a58a75019998214eb16dfef90387da9c05583]|
[unit test | https://cassci.datastax.com/view/Dev/view/DikangGu/job/DikangGu-CASSANDRA-8398-trunk-testall/]|
[dtest | https://cassci.datastax.com/view/Dev/view/DikangGu/job/DikangGu-CASSANDRA-8398-trunk-dtest/]
|

> Expose time spent waiting in thread pool queue 
> -----------------------------------------------
>
>                 Key: CASSANDRA-8398
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8398
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: T Jake Luciani
>            Assignee: Dikang Gu
>            Priority: Minor
>              Labels: lhf
>             Fix For: 3.12
>
>
> We are missing an important source of latency in our system, the time waiting to be processed
by thread pools.  We should add a metric for this so someone can easily see how much time
is spent just waiting to be processed.



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