Bug#1001118: apt-daily*.timer on occasionally running computers

[Moritz Duge <MoritzDuge@kolahilft.de>]

Package: apt
Version: 2.2.4

If a computer is only running occasionally the apt-daily*.timers
(apt-daily.timer and apt-daily-upgrade.timer) are hardly ever executed.
As far as I understand this is because of the RandomizedDelaySec values 
for the timers. Especially the 12h for the apt-daily.timer.


Lets say a computer is running only 30 minutes every month.
That makes 6 hours a year.
Then statistically the apt-daily.timer will only run once every 2 years.

Those computers could be rarely used pc's, notebooks or even 
offline-backup systems.
I'm not an expert for systemd timers. But I'd say the timer should run 
immediately after boot (and wakeup from s2ram/s2disk), if the timer 
expired while the computer wasn't running.


This is a notebook, being rarely used by one of my family members.
You can see, that it's being used for 5 to 60 minutes every few weeks.

$ zgrep -aEo '.*(Command line: BOOT_IMAGE=|PM: hibernation: hibernation 
(entry|exit))' /var/log/messages{.2,.1,}
/var/log/messages.2:Nov  6 13:36:38 MyPC kernel: [ 7024.194560] PM: 
hibernation: hibernation exit
/var/log/messages.2:Nov  6 13:46:51 MyPC kernel: [ 7638.066922] PM: 
hibernation: hibernation entry
/var/log/messages.2:Nov 26 15:32:20 MyPC kernel: [ 7647.920545] PM: 
hibernation: hibernation exit
/var/log/messages.1:Nov 26 16:26:32 MyPC kernel: [10918.255697] PM: 
hibernation: hibernation entry
/var/log/messages.1:Dec  1 11:17:26 MyPC kernel: [10945.390253] PM: 
hibernation: hibernation exit
/var/log/messages.1:Dec  1 11:21:38 MyPC kernel: [11198.595707] PM: 
hibernation: hibernation entry
/var/log/messages.1:Dec  1 11:22:52 MyPC kernel: [11251.644099] PM: 
hibernation: hibernation exit
# shut down at Dec 1 around 12:00 (couldn't find that in the logs)
/var/log/messages.1:Dec  4 18:52:44 MyPC kernel: [    0.000000] Command 
line: BOOT_IMAGE=

$ systemctl list-timers apt-daily.timer
NEXT                        LEFT       LAST 
PASSED              UNIT            ACTIVATES
Sat 2021-12-04 19:21:08 CET 17min left Mon 2021-11-01 12:16:15 CET 1 
months 2 days ago apt-daily.timer apt-daily.service



Regards,
kolAflash



--
https://misc.kolahilft.de/pgp/MoritzDuge_0xC49633CB.asc

Attachment: OpenPGP_signature
Description: OpenPGP digital signature