[Mailman-Developers] Fwd: How To change queue process method

Maickel Pandie maickel.pandie at gmail.com
Fri Jun 6 10:23:57 CEST 2008

Thanks Mark and Ian for your suggestion,
I want ask again,
1. Is queue runners like Incomingqueue runner so I have to make more
Incomingqueue runner?
2. How can I made more queue runners?
3. Can I make more queue pipe so incoming email is deliver to pipe
depend on their size and domain destination?
4 If I bombard my mailing list server using email stress test can I
make a lot of waiting process in queue?


---------- Forwarded message ----------
From: Ian Eiloart <iane at sussex.ac.uk>
Date: 2008/6/4
Subject: Re: [Mailman-Developers] How To change queue process method
To: Mark Sapiro <mark at msapiro.net>, Maickel Pandie
<maickel.pandie at gmail.com>, mailman-developers at python.org

--On 3 June 2008 11:51:31 -0700 Mark Sapiro <mark at msapiro.net> wrote:

> Maickel Pandie wrote:
>> I had research about how fast MTA (postfix) can deliver a lot of email
>> from mailman.
>> The one that I want to change is queue process method from FIFO to
>> size based(sum of domain in the list x size of email),
>> I have a list that contain the sum of domain each mailing list.
>> I want Mailman prefer sending email that have less domain destination
>> and small size of email.
>> Can you tell me what file I have to edit so mailman can decide what
>> email is thrown to postfix first?
> You would need to modify the Switchboard.files() method in module
> Mailman/Queue/Switchboard.py.
> Think hard before you move away from FIFO queue processing. If your out
> queue is not backlogged, it will essentially be processed FIFO in any
> case because each time you look there will only be one or two entries
> to process. If it is backlogged and you process in any but FIFO order,
> you run the risk of leaving non-preferred entries unprocessed for very
> long times.
> Also, your specific strategy would penalize larger (perhaps more
> popular) lists by delaying posts to those lists in favor of those to
> smaller (perhaps obscure) lists. Is this really what you want to do?

A better solution might be to configure Mailman to use more queue
runners. We saw a massive performance increase when we did that,
because a single large delivery would not hold up other quicker

Ian Eiloart
IT Services, University of Sussex

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