Comment 40 for bug 1686470

Test of 0.93.1ubuntu2.3 & 1.4.6~17.04.1 together are fine. please release the two together.

@mikini - it is prudent from OS vendor point of view to enable and install security updates by default, as most users neglect to set it up themselves. unattanded-upgrades is one way to do this, but it is an optional component of the system and many users use other means to keep their systems secure. The constraints on randomising downloads is due to mirror load spikes. The constraint on consistent and predicable application of updates is due to unexpected behavior experienced by our user base when random application of updates was in place. Overall it is a sensible default. We do monitor crash and error rates, and that data suggests to us that people routinely postpone upgrades or delay them. As for key crashes we reach 90% of updates applied within 2 weeks. Thus defaults to apply updates within a day are sensible. Please note that adjusting .timer frequency alone will not be sufficient as apt has its own internal timestamps too which throttle unattanded upgrades. If you want full control of upgrades do execute / automate them in a manner that is appropriate for your deployment. There is nothing in place that would prevent you from doing that. Many people use other mechanisms for upgrades, e.g. landscape.