[Bug 2062446] Re: 50+ minutes CPU time for /tmp/ubuntu-release-upgrader-29r0z57l/mantic is excessive

[Nick Rosbrook]

*** This bug is a duplicate of bug 1874272 ***
    https://bugs.launchpad.net/bugs/1874272

** This bug has been marked a duplicate of bug 1874272
   Stage "searching for obsolete software" takes a very long time (30 minutes)

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Title:
  50+ minutes CPU time for /tmp/ubuntu-release-upgrader-29r0z57l/mantic
  is excessive

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
  root       11954 51.0  1.2 555772 196136 pts/2   Rl+  10:15  50:39 /usr/bin/python3 -s /tmp/ubuntu-release-upgrader-29r0z57l/mantic --mode=server --frontend=DistUpgradeViewText

  This amount of CPU time on a i7-8665U is grossly excessive. According
  to Passmark the latest i9 CPUs are only about 2.5* faster than this
  one which means it would take 20+ minutes on an i9.

  At least there should be an option for the user to skip this step.

  ProblemType: Bug
  DistroRelease: Ubuntu 23.10
  Package: ubuntu-release-upgrader-core 1:23.10.14
  ProcVersionSignature: Ubuntu 6.5.0-27.28~22.04.1-generic 6.5.13
  Uname: Linux 6.5.0-27-generic x86_64
  ApportVersion: 2.27.0-0ubuntu5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CrashDB: ubuntu
  CrashReports: 640:246836501:124:1780063:2024-04-19 10:21:42.539683522 +1000:2024-04-19 10:21:42.547683513 +1000:/var/crash/_usr_libexec_tracker-extract-3.246836501.crash
  CurrentDesktop: KDE
  Date: Fri Apr 19 11:39:48 2024
  InstallationDate: Installed on 2023-04-14 (371 days ago)
  InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
  JournalErrors:
   Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
         Users in groups 'adm', 'systemd-journal' can see all messages.
         Pass -q to turn off this notice.
   No journal files were opened due to insufficient permissions.
  PackageArchitecture: all
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to mantic on 2024-04-19 (0 days ago)
  VarLogDistupgradeApttermlog: Error: [Errno 13] Permission denied: '/var/log/dist-upgrade/apt-term.log'

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