After digging a bit deeper I found out that that the default configuration of
/etc/apt/apt.conf.d/50unattended-upgrades is exactly the same as I had in my
experiment i.e.
- the ${distro_id}:${distro_codename}-security origin is ENABLED
- the ${distro_id}:${distro_codename}-updates and others origin are DISABLED
The consequences are the following. A fresh install of Ubuntu LTS e.g.
16.04 keeps installing the *-security updates, but not the *-updates
ones. The number of packages with new versions in *-updates repository
keeps growing unless somebody installs them manually. It is a couple of
clicks, but still many people never do it. As the list of upgradable
packages grows, unattended-upgrades get slower and slower to the point
that it may take hours to complete. Effectively, the automatic updates
may no longer work at all depending on how a given system is used. Also
the user experience gets worse with CPU busy executing the unattended-
upgrades script.
All in all, I consider it a serious issue that requires attention.
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Ubuntu.
https://bugs.launchpad.net/bugs/1396787
Title:
checking trust of archives eats a lot of cpu
Status in unattended-upgrades package in Ubuntu:
New
Bug description:
(System: Ubuntu 14.04, up to date packages)
I noticed that unattended-upgrades spends a significant amount of time
in phases where it runs at 100% cpu. On a slower machine (core 2 t7200
2GHz) this goes on for minutes rather than seconds. This interferes
with using the machine for other tasks.
Using the --debug option to unattended-upgrades shows that the program
outputs a lot of lines like the following during these 100% cpu
phases:
matching 'a'='trusty-updates' against '<Origin component:'universe'
archive:'trusty-updates' origin:'Ubuntu' label:'Ubuntu'
site:'de.archive.ubuntu.com' isTrusted:True>
From this output I guess the operation executed is not so complicated
that it should require so much cpu power. ??
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unattended-upgrades 0.82.1ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10
Uname: Linux 3.13.0-40-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
Date: Wed Nov 26 21:53:57 2014
InstallationDate: Installed on 2014-08-28 (90 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64
(20140416.1)
PackageArchitecture: all
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: unattended-upgrades
UpgradeStatus: No upgrade log present (probably fresh install)
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