[Mailman-Users] Bounces Issue - Revisit II
J C Lawrence
claw at kanga.nu
Fri Dec 17 18:28:32 CET 1999
On Fri, 17 Dec 1999 09:04:45 -0800 (PST)
Dan Busarow <dan at dpcsys.com> wrote:
> On Thu, 16 Dec 1999, J C Lawrence wrote:
>> Consider: *ANYBODY*, right now, can bring your server to its
>> knees with a mail storm. Bad ju jus. Configure your MTA to
>> protect itself and your system. Let your secondary MX'es, who
>> are similarly configured, absorb peak loads. Let the originating
>> sites hold the mail in normal SMTP fashion until the peak has
>> smoothed out a bit.
> This volume isn't particularly high for straight sendmail/procmail
> delivery. We see higher during large spam runs. But throw python
> in the picture and things go down hill fast.
Ahh. Yes, that it would. You said 100's -- just how large are you
talking? While my current mail server is a little heftier than
yours (dual P-333 with 512Meg RAM, Ultra-SCSI III disks and
configured for 30 queue runners) even with an inbound rate of ~500
messages per minute all of them headed to MailMan in some fashion
(list posts or bounces) I haven't seen the system load go over 16.
If you need limit to a smaller number without limiting your
incomings, then a simple procmail rule inserted in front of the
bounce wrapper to serialise or at least limit parallelism for
bounces would probably do it.
--
J C Lawrence Home: claw at kanga.nu
----------(*) Other: coder at kanga.nu
--=| A man is as sane as he is dangerous to his environment |=--
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