My postfix mail server was taking ages (well, minutes, but still, that is really ages in a computer world) to handle a single email with multiple processes taking a full CPU, all the time! What?
I got it solved (after a couple of hours making U-turns in dead ends) and as always, the answer was really trivial. But I know I’ll be losing another couple of hours next time I run a “yum update”, so here is another in the “let’s blog about it so I remember how to fix it next time” series!