[Mailman-Users] High usage -- making Mailman "nice"

Brad Knowles brad at stop.mail-abuse.org
Thu Dec 8 19:49:21 CET 2005

At 1:12 PM -0500 2005-12-08, John Dennis wrote:

>>  We're running MM v2.1.4-4, we're experiencing such high usage on our
>>  dual xeon server when mailman sends to 4000 users that port 25
>>  becomes unresponsive.  is there a way to "nice" the mailman delivery?
>  It sounds like your MTA is inefficient in some manner, is not a huge
>  load for a dual server backed with a high bandwith connection. How many
>  client connections can it simultaneously handle? Any chance you've got
>  DNS delays (especially reverse lookup)?

	They could also be doing all sorts of 
authentication/authorization or anti-spam/anti-virus checks on their 
outgoing mail.

	It is clearly stated in the FAQ that this is generally a bad idea 
for outgoing mail from the mailing list, since all that stuff should 
have been checked on the way in.

	The OP would be well-served to go to the Mailman FAQ Wizard at 
<http://www.python.org/cgi-bin/faqw-mm.py> and search for 
"performance", and read all the related FAQ entries.  If you go down 
that list, I bet you'll find the problem and be able to relatively 
easily fix it.

Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

  LOPSA member since December 2005.  See <http://www.lopsa.org/>.

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