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https://issues.apache.org/jira/browse/DIRMINA-681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12694479#action_12694479
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Mauritz Lovgren edited comment on DIRMINA-681 at 4/1/09 4:32 AM:
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This is easily reproducable by creating a test server having thousands of
clients doing almost nothing (just sending a heartbeat or similar every
minute). The CPU peak seems to occur every 10 - 12 minutes, lasting about 2
minutes each time it occurs. Highest CPU at the beginning, creating a classic
Mount Everest profile :-).
was (Author: mauritz):
This is easily reproducable by creating a test server having thousands of
clients doing almost nothing (just sending a heartbeat or similar every
minute). The CPU peak seems to occur every 10 - 12 minutes.
> 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: Bug
> Components: Core
> Affects Versions: 2.0.0-M4
> Environment: Windows Vista Ultimate 64-bit (on 64-bit Sun JDK
> 1.6.0_12). Intel Core 2 Quad Core Q9300 2,5 GHz, 8 GB RAM
> Reporter: Mauritz Lovgren
> Attachments: screenshot-1.jpg, screenshot-2.jpg, screenshot-3.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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