[svlug] exim?

[J C Lawrence]

On Sat, 10 Feb 2001 00:13:22 -0800 
Aaron Lehmann <aaronl at vitelus.com> wrote:

> On Sat, Feb 10, 2001 at 12:10:59AM -0800, J C Lawrence wrote:
>> I'm not aware of any.  The tests I did for a client a few months
>> ago were not rigorous enough (or normalised) for useful
>> publication (ie it would have been easy to poke holes and ignore
>> the revealed trends).

> Well, what did you find?

That Exim and Postfix had very similar performance rates at the
following two load points:

  -- Continutally busy

  -- Saturated

However the curves that each took to reach those load points were
significantly different, with the most general characteristic being
that Exim tended to be kinder on the localhost in terms of load and
responsetimes at the expense of tending to maintain a more continual
low level queue activity, whereas Postfix tended toward system
hammering burstiness in very short-termed responses to load.

> How did you perform the tests?

Two to three machines (what I had on hand).  One MTA, the others
generating and receiving messages.  Some messages generated locally
to the MTA via direct injection into the spool.  The stats I tracked
were rate of deliveries and system load.

-- 
J C Lawrence                                       claw at kanga.nu
---------(*)                          http://www.kanga.nu/~claw/
--=| A man is as sane as he is dangerous to his environment |=--