Ubuntu 12.04 downloads i386 sources on amd64 system

[agent 8131]

I've only done 2 amd64 system upgrades to 12.04 but on both I've found that after the upgrade the sources are pulled for both the amd64 architecture as well as the i386 architecture whic leads to various problems. On a test machine I'm running in the the "Dynamic MMap ran out of room" error. I do not need any i386 packages on my amd64 systems. There should be an option to disable this new behavior but I have yet to find it.

Here is apt-get update (can't connect to security.ubuntu.com but I'm guessing that's unrelated):

# apt-get update
Ign http://ubuntu.osuosl.org precise InRelease
Ign http://ubuntu.osuosl.org precise-updates InRelease
Hit http://ubuntu.osuosl.org precise Release.gpg
Hit http://ubuntu.osuosl.org precise-updates Release.gpg
Hit http://ubuntu.osuosl.org precise Release
Hit http://ubuntu.osuosl.org precise-updates Release
Hit http://ubuntu.osuosl.org precise/main amd64 Packages
Hit http://ubuntu.osuosl.org precise/universe amd64 Packages
Hit http://ubuntu.osuosl.org precise/main i386 Packages
Hit http://ubuntu.osuosl.org precise/universe i386 Packages
Hit http://ubuntu.osuosl.org precise/main TranslationIndex
Hit http://ubuntu.osuosl.org precise/universe TranslationIndex
Hit http://ubuntu.osuosl.org precise-updates/main amd64 Packages
Hit http://ubuntu.osuosl.org precise-updates/universe amd64 Packages
Hit http://ubuntu.osuosl.org precise-updates/main i386 Packages
Hit http://ubuntu.osuosl.org precise-updates/universe i386 Packages
Hit http://ubuntu.osuosl.org precise-updates/main TranslationIndex
Hit http://ubuntu.osuosl.org precise-updates/universe TranslationIndex
Hit http://ubuntu.osuosl.org precise/main Translation-en
Hit http://ubuntu.osuosl.org precise/universe Translation-en
Hit http://ubuntu.osuosl.org precise-updates/main Translation-en
Hit http://ubuntu.osuosl.org precise-updates/universe Translation-en
Ign http://ppa.launchpad.net lucid InRelease
Ign http://ppa.launchpad.net lucid InRelease
Hit http://ppa.launchpad.net lucid Release.gpg
Hit http://ppa.launchpad.net lucid Release.gpg
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid Release
Hit http://ppa.launchpad.net lucid/main amd64 Packages
Hit http://ppa.launchpad.net lucid/main i386 Packages
Ign http://ppa.launchpad.net lucid/main TranslationIndex
Hit http://ppa.launchpad.net lucid/main amd64 Packages
Hit http://ppa.launchpad.net lucid/main i386 Packages
Ign http://ppa.launchpad.net lucid/main TranslationIndex
Ign http://ppa.launchpad.net lucid/main Translation-en_US
Ign http://ppa.launchpad.net lucid/main Translation-en
Ign http://ppa.launchpad.net lucid/main Translation-en_US
Ign http://ppa.launchpad.net lucid/main Translation-en
Err http://security.ubuntu.com precise-security InRelease

Err http://security.ubuntu.com precise-security Release.gpg
  Unable to connect to security.ubuntu.com:http: [IP: 91.189.92.166 80]
E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf)
Reading package lists... Error!
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/InRelease

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg Unable to connect to security.ubuntu.com:http: [IP: 91.189.92.166 80]

W: Some index files failed to download. They have been ignored, or old ones used instead.
E: Unable to increase the size of the MMap as the limit of 25000000 bytes is already reached.
E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-Limit. Current value: 25165824. (man 5 apt.conf)
E: Error occurred while processing libcheese3 (NewVersion2)
E: Problem with MergeList /var/lib/apt/lists/ubuntu.osuosl.org_ubuntu_dists_precise_universe_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.

[agent 8131 (agent-8131)]

Apparently this was introduced in 11.10 but I didn't notice because I skipped 11.10 entirely.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel Hartwig (wigs)]

Multi-arch is enabled by default on amd64 systems from 11.10 onwards. See this page for information on disabling:

http://askubuntu.com/questions/66875/how-to-disable-multiarch-support

and this page which notes why that might not be a good idea:

https://help.ubuntu.com/community/MultiArch

> E: Dynamic MMap ran out of room. Please increase the size of APT::Cache-
> Limit. Current value: 25165824. (man 5 apt.conf)

This error mentions how it can be resolved.

[Julian Andres Klode (juliank)]

AFAIK, you should not get any problems with cache limits, unless you enabled any limit thing yourself in the configuration, as the cache can grow.