[Mailman-Users] Running large announce list & forums

Jack Stone antennex at swbell.net
Thu Sep 7 05:11:27 CEST 2006

Brad Knowles <brad at stop.mail-abuse.org> wrote:    At 6:45 AM -0700 2006-09-06, Jack Stone wrote:

> Being a nuB to Mailman (but old hand with majordomo), I have noted that if
> a message is being processed out to one of the large customer announcement
> lists (10,000+) that it seems the separate discussion lists' deliveries
> slow down substanially -- from minutes to hours! One member report 18
> hours from post to receipt.

That could be a result of a slowdown within the Mailman queue 
processing system, or it could be a slowdown within the queue 
processing system of sendmail, once the message it out of the hands 
of Mailman.
Brad Knowles, 

  I'll have to check on the things you suggested, but just a quick response without more specifics, I've noticed it takes a long, long time for the announcement list to reach the sendmail queue -- and the "qfiles/out" is usually choked with queued messages for quite a while. It appears the discussion list has to wait in line..
  By past experience with majordomo, it would "cook" the big one-way announcement list for a couple hours, but still send out the discussion postings (plus regular user mail) immediately without delay -- and although the dam would burst into sendmail queue from the eventual fully-cooked (batched) announcements (10,000+), it would still pass all other requests to sendmail's queue.
  I know this is not majordomo, just looking for anything I may have mis-configured that may cause this delay. Sendmail has always handled my loads with ease -- all mail lists, plus individual users.
  I'll look at your notes more closely next.
  Thanks, Brad.

Best regards,
Jack L. Stone

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