[Mailman-Users] big lists, big messages

[Rabinowitz, Ari (Exchange)]

Chuq,

Thanks for all of your good ideas in this thread.  I'm new to Postfix, and
Mailman.  How would I defer DNS in Postfix?  I have a few lists (read only)
with about 1200 addresses that send out only a few messages a day, at most.
I have MAX_RCPT_TO set to 500 so I would expect mailman to split the lists
into 3 messages, although it ends up splitting into 4 messages, two with
about 500 recipients each, and then two smaller lists instead of just one.

I am using Postfix as the MTA and it seems to work well, but I notice from
the logs that it seems that Postfix only gets one message at a time from
Mailman.  Is this because of my Mailman settings or my Postfix settings?
What controls this?

Any suggestions as to speeding up delivery of the messages would be
appreciated.

Thanks,
Ari Rabinowitz

-----Original Message-----
From: Chuq Von Rospach [mailto:chuqui at plaidworks.com]
Sent: Sunday, May 13, 2001 2:21 AM
To: J C Lawrence
Cc: Ian White; Mailman Users Group
Subject: Re: [Mailman-Users] big lists, big messages 


On 5/12/01 10:51 PM, "J C Lawrence" <claw at kanga.nu> wrote:

> I find this curious.  I have MAX_RCPT_TO set to 5, and to broadcast
> 30 messages to a subscriber base of 1,000 (ie 6,000 spool entries)
> through qrunner to the MTA (postfix) on a dual PII-333 takes just
> over 6 seconds once started.  Admittedly that's an appreciable time,
> but its also not that long a time in the lands of lock contention
> and lock timeouts.

It all comes down to how fast your MTA accepts messages. If you're running
postfix with DNS deferred, you rock. If you're running sendmail with DNS on,
it's a lot slower. So it's something you have to judge based on your own
system.



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