The mailing list for listmasters using Sympa

[David Carter <address@concealed>]

On 25/04/2023 13:15, Rob Mitchell (via en Mailing List) wrote:
> Our Sympa installation has 7k lists and sends roughly 600k messages 
> daily.  During our delivery delays (30 mins+) we see all 4 CPUs maxed 
> out, but memory usage is ok.  We have a change in to double our core 
> count to 8 CPUs to help mitigate but I am wondering what others are 
> using for similar sized servers.

I don't suppose you are using Exim as your Mail Transport Agent?

We run a Sympa installation with a similar number of lists (although I 
think fewer messages per day) and it is more or less idle once I added a 
workaround for:

  # Work around https://bugs.exim.org/show_bug.cgi?id=2819
  receive_timeout = 10m

Prior to that Exim was taking a lot of effort to process large messages.

This pushed up the load averages and added delays as Sympa will only 
process a few messages at a time.

--
David Carter                             Email: address@concealed
University of Cambridge,                 Phone: (01223) 334502
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