[Mailman-Users] Sendmail Performance with mailman

[Bueschel, Eric W RWBAHC DIN-PACS]

Thanks for the answer.  By default in Slackware, the sendmail queue was
running every 15 minutes, so I set it to 2 minutes.  That seems to have sped
it up quite a bit.  Now if I could just solve the DNS problem without
running Bind locally...........
Eric

> -----Original Message-----
> From: Graham TerMarsch [mailto:graham at howlingfrog.com]
> Sent: Friday, May 03, 2002 1:27 PM
> To: Bueschel, Eric W RWBAHC DIN-PACS
> Cc: mailman-users at python.org
> Subject: Re: [Mailman-Users] Sendmail Performance with mailman
> 
> 
> On May 3, 2002 12:18 pm, Bueschel, Eric W RWBAHC DIN-PACS wrote:
> > As of today, I am no longer getting failures in the smtp-error logs,
> > however it seems that incoming messages are parsed to mailman, then
> > queued for 10 to 40 minutes where they just wait.  No errors, no
> > timeouts, they just wait. Here is a sample from the sendmail output:
> [.....snip.....]
> 
> From having used Mailman+Sendmail together for quite some 
> time, I'd wager a 
> guess that the behaviour that you're seeing is related to the 
> way that 
> you've got Sendmail configured.
> 
> If you're using "-ODeliveryMode=defer", then what you're 
> telling Sendmail 
> is to just queue the message up for later delivery and _NOT_ 
> to attempt to 
> send it right now.  When Sendmail comes along later and does 
> a queue run, 
> it'll find the msg, and whisk it off on its way.  When you're 
> using the 
> box as a relay or for local mail, you're not connecting to it on port 
> 1313, so its not using the "deferred" delivery mode.
> 
> Feel free to reply off-list if you'd like to go into greater 
> detail on 
> this.  I know that Chuq here has used Sendmail for some time 
> now, and I 
> used it for a list I work with up to ~250k subscribers.  At 
> that point we 
> switched the machine over to Postfix as I couldn't get 
> Sendmail to send 
> the msgs out fast enough, even with all the tunes and tweaks 
> that we had 
> in place.  Not to say that Sendmail can't handle that kind of 
> load, it 
> just couldn't handle it on the hardware that we had available at that 
> time; on the same hardware Postfix gave us better performance for our 
> lists.
> 
> Don't take me wrong, though, I do like Sendmail, and have 
> used it for many 
> years quite successfully; for _really_large_ lists, though, I 
> found it 
> easier to tune things with Postfix.  If you'd like extra 
> assistance in 
> getting your Sendmail install tuned properly for your list, 
> do feel free 
> to drop me a note off-list and I'd be happy to help out.
> 
> -- 
> Graham TerMarsch
> Howling Frog Internet Development, Inc.   http://www.howlingfrog.com
> 
> 
> 
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