[Bug 979696] Re: apt-get check apparently consuming CPU leaving instance unusable

[Michael Nelson]

This happened again today, and it seems it's not related to apt-cache
itself (sorry). It runs slowly and consumes heaps of CPU, but so does
everything else. This time I even saw vim take over 60% cpu while
starting, as well as multiple postgres processes etc., so it seems
related to the system itself - just wish I knew how to find out what.

If there's anything I can do to give more info, pls let me know.

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Title:
  apt-get check apparently consuming CPU leaving instance unusable

Status in “apt” package in Ubuntu:
  New

Bug description:
  Each morning I have trouble ssh'ing into a precise instance which I
  have running (on canonistack). After several minutes I am able to get
  to a shell and run `top` which shows apt-get consuming the CPU (load
  went over 18).

  Rebooting the instance certainly helped yesterday, but since it
  happened again, I've tried to collect the info:

  grepping for the actual process processes shows me (`ps fax | grep
  apt-get`)

  24417 ?        D     18:56                  \_ apt-get check -f -qq

  I had to kill 24417 before `ubuntu-bug apt` would progress.

  Let me know if there are other logs to attach.

  NOTE: I can't be sure this is in fact related to apt-get. It seems
  after killing apt-get and reporting this bug, the system is still very
  slow (although load is fine). I'll try to run the apt cron script
  manually and see if it puts the machine into the same state after a
  reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: apt 0.8.16~exp12ubuntu7
  ProcVersionSignature: User Name 3.2.0-22.35-virtual 3.2.14
  Uname: Linux 3.2.0-22-virtual x86_64
  ApportVersion: 2.0-0ubuntu4
  Architecture: amd64
  Date: Thu Apr 12 08:41:20 2012
  Ec2AMI: ami-00000097
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.medium
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  ProcEnviron:
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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