This bug was fixed in the package software-center - 5.3.12

---------------
software-center (5.3.12) quantal; urgency=low

  [ Michael Vogt ]
  * lp:~mvo/software-center/inspect-memleak:
    - fix two memory leaks when the cache is re-opened after
      a package has been installed/removed (LP: #1003466), add
      memory usage test/monitoring utilities and a set of new
      unit tests
  * lp:~mvo/software-center/lp1047281:
    - fix crashing bug due to a unicode decode error and add
      a regression unit test (LP: #1047281)
  * lp:~mvo/software-center/region-whitelist-lp1006570:
    - fix missing region whitelist support that is used by
      the software-center-agent (LP: #1006570)
  * debian/test/run-tests:
    - unset TMPDIR and do not run with sh -x, thanks to Martin Pitt
    - fix when run from the binary Package, thanks to
      Jean-Baptiste Lallement

  [ Gary Lasker ]
  * lp:~gary-lasker/software-center/recommender-test-fix:
    - update the recommender feedback unit test to work on systems
      that are not opted-in
 -- Michael Vogt <[email protected]>   Tue, 11 Sep 2012 14:37:43 +0200

** Changed in: software-center (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1003466

Title:
  Software Center Memory/Processor bug

Status in “software-center” package in Ubuntu:
  Fix Released

Bug description:
  Bug Description:
  Software Centers memory usage increases the more applications you install, to 
monitor this effect I am going to do a single For Purchase install and the an 
run with 7 For Purchase apps and attach the logs to this bug.

  Then a single repo app and then several repo apps.

  OS:
  64bit Precise

  USC Version:
  5.2.1

  Steps To Reproduce:
  1. Open USC install an app.
  2. Click on All software once app 1 has installed
  3. Install another app
  4. Click on All Software once app 2 has installed
  5. install another app and so on
  6. monitor the memory used at each point ( I used ldtp's 
startlog('path/to/log.file') startprocessmonitor('software-center') then when 
finished stopprocessmonitor('software-center') stoplog()

  Expected Results:
  I expect the memory usage to not increase more than a set amount per app 
install.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: software-center 5.2.1
  ProcVersionSignature: Ubuntu 3.2.0-24.38-generic 3.2.16
  Uname: Linux 3.2.0-24-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  Date: Wed May 23 15:32:24 2012
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: software-center
  UpgradeStatus: No upgrade log present (probably fresh install)

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