[Mailman-Users] Capacity

Chuq Von Rospach chuqui at plaidworks.com
Thu Dec 20 16:33:32 CET 2001

On 12/20/01 1:01 AM, "J C Lawrence" <claw at kanga.nu> wrote:

>> Are there any capacity limitations as far as the number of names
>> mailman can handle at a single time?
> Explicitly no.  In terms of runtime resource consumption, yes.

I'd be very wary, unless you have really large iron. The current mailman
data structures would struggle with that much data. With 2.1 and an external
database datastore, it will be better, but what that means is still unknown
since we haven't tested it.

I'd expect the bounce processing and the add/remove functions would have a
big problem processing in a timely manner on Mailman 2.0.x. It's just not
designed for this large a subscriber set.

Also -- you can't just say "can it handle this?" -- you have to define "how
quickly". If it can take a week to deliver, well, you could house this on a
TRS-80. You need to understand what your performance requirements are, and
size is just ONE piece of that.

> Interesting.  That is a suspiciously large number given that the
> second largest known list on the planet has just over 2 million
> subscribers.

Really? I manage two larger than that (neither on mailman). I know I'm not
the two largest lists, either. Not by a long-shot. I think your data is

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