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From Serge Knystautas <ser...@lokitech.com>
Subject Re: James SMTPServer load test - from 6req/s and crash -> 26req/s no crash
Date Mon, 03 Jun 2002 05:45:33 GMT

Please send any/all patches to the listserv.  One of us will try to 
review and commit them assuming we don't see any problems.  Your 
improvements sound very encouraging.
Serge Knystautas
Loki Technologies - Unstoppable Websites

Andrei Ivanov wrote:
> Hi,
> Please refer to my previous post about James SMTPServer load test for more
> details on this issue.
> In short:
> 1. James SMTPServer part was tested for number of incoming 4KB mails it can
> accept
> 2. All other parts of James were not in use by commenting out
> mailServer.sendMail(mail); @line 615 in SMTPHandler.
> 3. James SMTPServer crashed after certain number of requests with
> OutOfMemory exception
> Studying the results of my previous tests showed most likely the problem is
> in how SMTPHandler unallocates resources when connection has to be released.
> In fact it didn't do any resources release. So I put my efforts in
> refactoring
> SMTPServer
> SMTPHandler (only few changes)
> BaseConnectionHandler
> I replaced BaseConnectioHandler with AbstractServer which implements
> ConnectionHandlerFactory.
> Every other server class can now inherit from new AbstractServer  by
> implementing its "public abstract createConnectionHandler()".
> Main achievement is that this way it is possible to unallocate explicitly
> resources used by any connection handler.
> So I made SMTPHandler to be disposable and simply "multiplied by null" all
> its resources in its dispose.
> The result is in subject of this letter.
> Opinions, ideas?
> Andrei
> PS still using java 1.3.1_02 :-)

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