[Bug 1001780] Re: apt-get update size is too big

[John S. Gruber]

Terminal logs of http headers showing changing modification times and
md5sums of the unchanging files. Included both archives.ubuntu.com and
us.archives.ubuntu.com. A packet trace showed that apt is using a "If-
Modified-Since" header which is being subverted. The problem applies to
main and universe but not to, for example, the security repo.

** Attachment added: "Terminal logs of http headers showing changing modification times and md5sums of the unchanging files"
   https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1001780/+attachment/3155406/+files/terminal%20logs%20for%20lp%3A%20%231001780

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https://bugs.launchpad.net/bugs/1001780

Title:
  apt-get update size is too big

Status in “apt” package in Ubuntu:
  Confirmed

Bug description:
  I ran a clean install to Ubuntu 12.04 and so far everything has been
  working well. I especially commend the Ubuntu team for this release.

  I only noticed that the size of repository update is now about ~13MB.
  Normally, it is about this size for the first time you run apt-get
  update after a clean install and then ~ 23kb - 1300kb for subsequent
  updates.  However now it looks like it gets 13MB and bigger every now
  and then.

  Using us.archive.ubuntu.com archive, I see that the Universe Package
  files are being recreated a couple of times an hour, but contain the
  same content. The file modification date and expiration date, and in
  particular, the etag, are changing each time causing apt-get update to
  reload the Package file again even though it hasn't changed.

  Launchpad shouldn't recreating the Package files when no changes have
  been made to the contained packages.

  #http://askubuntu.com/questions/135818/the-apt-get-update-cache-size-
  is-too-big

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