Comment 6 for bug 1615482

Marking this 'high' and a regression. This had been deliberately engineered in Ubuntu to run once per day outside of normal work hours, with a random offset <1h to spread out the mirror load. The current behavior is not consistent with that design, and can be disruptive to the regular use of the system. (I experienced this today with my desktop going into a tailspin because my browser and apt were fighting for memory.)