mina-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mauritz Lovgren (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRMINA-681) Strange CPU peak occuring at fixed interval when several thousand connections active
Date Mon, 08 Feb 2010 14:07:28 GMT

    [ https://issues.apache.org/jira/browse/DIRMINA-681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12830948#action_12830948

Mauritz Lovgren commented on DIRMINA-681:

Yes, seems to me as well that it might perhaps not be the epoll situation that causes this

FYI: There is little CPU ativity when the stall occurs, so it doesn't seem to be a loop issue,
more a state problem.

> 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: 2.0.0
>         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.

This message is automatically generated by JIRA.
You can reply to this email to add a comment to the issue online.

View raw message