On 15.5.2013 20:30, Wietse Venema wrote:
Patrik appears to have a source of mail that will never be delivered.
He does not want to run a huge number of daemons; that is just
wasteful. Knowing that some mail will never clear the queue, he just
doesn't want such mail to bog down other deliveries.
From that perspective, the natural solution is to reserve some fraction
X of resources to the delivery of mail that is likely to be deliverable
(as a proxy: mail that is new).
Very well said. Describes my thoughts exactly.
So, if you don't mind, I would like to go ahead and try to implement
this limit, for both the delivery agent slots as well as the active
queue slots. I think that enough has been said about this to provide
evidence that adding such knob doesn't put us in any worse position than
we are at now, nor does it preclude us from using other solutions.
The only remaining objection seems to be the amount of back pressure
postfix applies to incoming mail, depending on the growth of the queue.
I believe this problem exists regardless of if this new knob is in place
or not, so it may as well be good idea to discuss this independently if
you feel like doing so now...
Patrik
