Juliana Rodrigueiro:
> > To get rid of the 2s delays:
> >
> > /etc/postfix/main.cf:
> > lmtp_connection_cache_on_demand = no
> >
> > Please let us know if that helps. Meanwhile we can develop a proper fix.
>
> And yes, it worked, that helped a lot. Although not as fast as before, but now
> I see only reasonable delays.
>
> Thank you very much for looking into it!!!
And thank you for your thorough investigation that helped to narrow
down the root cause: under high traffic conditions, LMTP connections
are cached but never reused, therefore those idle cached connections
are exhausting server resources.
Wietse
