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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DIRMINA-681) Strange CPU peak occuring at fixed interval when several thousand connections active
Date Fri, 10 Dec 2010 18:47:13 GMT

     [ https://issues.apache.org/jira/browse/DIRMINA-681?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Lecharny updated DIRMINA-681:
--------------------------------------

    Fix Version/s:     (was: 2.0.2)
                   2.0.3

> Strange CPU peak occuring at fixed interval when several thousand connections active
> ------------------------------------------------------------------------------------
>
>                 Key: DIRMINA-681
>                 URL: https://issues.apache.org/jira/browse/DIRMINA-681
>             Project: MINA
>          Issue Type: Task
>          Components: Core
>    Affects Versions: 2.0.0-M4, 2.0.0-RC1
>         Environment: Windows Vista Ultimate 64-bit (on 64-bit Sun JDK 1.6.0_18). Intel
Core 2 Quad Core Q9300 2,5 GHz, 8 GB RAM
>            Reporter: Mauritz Lovgren
>             Fix For: 2.0.3
>
>         Attachments: screenshot-1.jpg, screenshot-2.jpg, screenshot-3.jpg, screenshot-4.jpg
>
>
> Observing strange CPU activity occuring at regular (seemingly fixed) interval with no
protocol traffic activity.
> See attached window capture of task manager that shows this with 3000 active connections.
> Is there some kind of cleanup occuring within MINA core at a predefined interval?
> The 3000 connections in the example above connects within 250 seconds. A normal situation
would be that these connections are established over a longer period of time, perhaps spreading
the CPU peaks shown above as well, flattening the curve.

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