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Date: Wed, 15 Feb 2006 22:47:26 +0100
From: Niklas Therning <niklas@trillian.se>
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To: Apache Directory Developers List <dev@directory.apache.org>
Subject: Re: [mina] Socket IO processor, thread problem.
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fedechicco@gmail.com wrote:
> I have some problem with a simple application that does almost only IO
> on tcp sockets, it take me 100% CPU usage when I have 1000-1200
> connections.
> I have met this problem every time I use a single selector thread for
> many channels, and in my own old implementations I have divided the
> channels on different selector threads, and then all worked well.
> 
> I thought that I was not able to do well the selector loops, and so I
> have not taken care about it, but now with mina 0.9.0 I have the same
> problem.
> I don't know, do you all have the same problem with many sockets making
> I/O?
> 
> I will experiment with the "mina.socket.processor" property, but it will
> be strange if it works.

Have you tried tuning the number of threads in your thread pool
(ThreadPoolFilter)? Are you sure it's the selector thread which uses all
the cpu?

I haven't had any such issues but I haven't had that many active
connections either. Please keep us updated on how it works when using
the mina.socket.processor property.

/Niklas