[Bug 1233587] [NEW] apt-check is slow because it disables pkgcache and srcpkgcache

[Anders Kaseorg]

Public bug reported:

In /usr/lib/update-notifier/apt-check:

    # force apt to build its caches in memory for now to make sure
    # that there is no race when the pkgcache file gets re-generated
    #apt_pkg.config.set("debug::pkgcachegen","1")
    apt_pkg.config.set("Dir::Cache::pkgcache","")
    apt_pkg.config.set("Dir::Cache::srcpkgcache","")

This causes apt-check to be way slower than it should be (9 seconds
instead of 2.7 seconds). It was written in 2008, and the race condition
that the comment refers to was fixed in 2010:

http://anonscm.debian.org/gitweb/?p=apt/apt.git;a=commitdiff;h=3010fb0e069d2fd4c7a6ade4559bfb659bf8f2fb
http://anonscm.debian.org/gitweb/?p=apt/apt.git;a=commitdiff;h=22041bd2864b8d0b401b45dde9eda4003a11fec4

So I think it’s time to remove this slow workaround.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: update-notifier-common 0.145
ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
Uname: Linux 3.11.0-9-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.12.5-0ubuntu1
Architecture: amd64
Date: Tue Oct  1 05:54:39 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2010-12-05 (1031 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101202)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: update-notifier
UpgradeStatus: Upgraded to saucy on 2012-11-15 (319 days ago)

** Affects: update-notifier (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug saucy

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https://bugs.launchpad.net/bugs/1233587

Title:
  apt-check is slow because it disables pkgcache and srcpkgcache

Status in “update-notifier” package in Ubuntu:
  New

Bug description:
  In /usr/lib/update-notifier/apt-check:

      # force apt to build its caches in memory for now to make sure
      # that there is no race when the pkgcache file gets re-generated
      #apt_pkg.config.set("debug::pkgcachegen","1")
      apt_pkg.config.set("Dir::Cache::pkgcache","")
      apt_pkg.config.set("Dir::Cache::srcpkgcache","")

  This causes apt-check to be way slower than it should be (9 seconds
  instead of 2.7 seconds). It was written in 2008, and the race
  condition that the comment refers to was fixed in 2010:

  http://anonscm.debian.org/gitweb/?p=apt/apt.git;a=commitdiff;h=3010fb0e069d2fd4c7a6ade4559bfb659bf8f2fb
  http://anonscm.debian.org/gitweb/?p=apt/apt.git;a=commitdiff;h=22041bd2864b8d0b401b45dde9eda4003a11fec4

  So I think it’s time to remove this slow workaround.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: update-notifier-common 0.145
  ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
  Uname: Linux 3.11.0-9-generic x86_64
  NonfreeKernelModules: openafs
  ApportVersion: 2.12.5-0ubuntu1
  Architecture: amd64
  Date: Tue Oct  1 05:54:39 2013
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2010-12-05 (1031 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101202)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-notifier
  UpgradeStatus: Upgraded to saucy on 2012-11-15 (319 days ago)

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