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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8341) Expose time spent in each thread pool
Date Mon, 01 Dec 2014 12:09:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14229712#comment-14229712
] 

Robert Stupp commented on CASSANDRA-8341:
-----------------------------------------

Note: {{TheadMXBean.getCurrentThread...()}} definitely performs better than {{System.nanoTime()}}
- at least on OSX with a single 8-core CPU.

> Expose time spent in each thread pool
> -------------------------------------
>
>                 Key: CASSANDRA-8341
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8341
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Chris Lohfink
>            Priority: Minor
>              Labels: metrics
>         Attachments: 8341.patch, 8341v2.txt
>
>
> Can increment a counter with time spent in each queue.  This can provide context on how
much time is spent percentage wise in each stage.  Additionally can be used with littles law
in future if ever want to try to tune the size of the pools.



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