Re: [Exim] Exim performance on large mail systems

At 10:32 +0100 EXIMUsers@??? wrote:

>Are there any particular configuration changes that can help with
>performance on exim systems pushing a lot of mail and starting up a lot of
>proccesses? I was considering just setting queue_only, launching exim with
>"-bd -q1m" and then limiting the number of processes with queue_run_max..

Maybe you'd like to look at queue_smtp_domains for common (but not
necessarily important domains (e.g. hotmail.com, yahoo..) in combination
with perhaps -q{not very many}m--this will give you the benefit of
multiple messages down single SMTP connections (and thus single Exim
processes), but instant delivery for perhaps more important mail.

>Are there any possible problems I should be aware of with this solution, or
>does anyone else with similar usage levels have any tricks they can pass on
>for optimizing the mail delivery process?

If you're running -q1m you might easily find overlapping queue-running
processes (which can be capped with queue_run_max, though)

Matt