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[Bug 1291101] [NEW] Faulty memory managent, swap gets created even if not necessary

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Public bug reported:

I am running Firefox with 3 tabs (Gmail, Facebook and another website),
Shutter and VirtualBox (limited to 1024 MB). From the total of about 4GB
of RAM, 1GB is free. But my system is extremely slow because of the swap
that got created when I started VIrtualBox. So now I also run a 400+ MB
of swap which is extremely slow on standard HDD and I do not get it why,
because I still have 1 GB free memory. My swappiness is set to 10. See
the memory usage in the screenshot.

cat /proc/sys/vm/swappinessflorin@ToshibaSatellite-C650L:~$ cat /proc/sys/vm/swappiness
10

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-18-generic 3.11.0-18.32
ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
Uname: Linux 3.11.0-18-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  florin     1726 F.... pulseaudio
Date: Wed Mar 12 01:16:14 2014
HibernationDevice: RESUME=UUID=67290dc6-2f7a-446c-9e80-37b3e8688698
InstallationDate: Installed on 2013-10-19 (143 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
Lsusb:
 Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 003: ID 10f1:1a2a Importek Laptop Integrated Webcam
 Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: TOSHIBA Satellite C650
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-18-generic root=UUID=63a6fe05-518d-4388-8787-f51a01a3d0c4 ro persistent quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.11.0-18-generic N/A
 linux-backports-modules-3.11.0-18-generic  N/A
 linux-firmware                             1.116.2
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/28/2011
dmi.bios.vendor: INSYDE
dmi.bios.version: 2.00
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr2.00:bd06/28/2011:svnTOSHIBA:pnSatelliteC650:pvrPSC14E-00400MG5:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Satellite C650
dmi.product.version: PSC14E-00400MG5
dmi.sys.vendor: TOSHIBA

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug saucy

** Attachment added: "System Monitor_453.jpg"
   https://bugs.launchpad.net/bugs/1291101/+attachment/4019023/+files/System%20Monitor_453.jpg

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https://bugs.launchpad.net/bugs/1291101

Title:
  Faulty memory managent, swap gets created even if not necessary

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I am running Firefox with 3 tabs (Gmail, Facebook and another
  website), Shutter and VirtualBox (limited to 1024 MB). From the total
  of about 4GB of RAM, 1GB is free. But my system is extremely slow
  because of the swap that got created when I started VIrtualBox. So now
  I also run a 400+ MB of swap which is extremely slow on standard HDD
  and I do not get it why, because I still have 1 GB free memory. My
  swappiness is set to 10. See the memory usage in the screenshot.

  cat /proc/sys/vm/swappinessflorin@ToshibaSatellite-C650L:~$ cat /proc/sys/vm/swappiness
  10

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-18-generic 3.11.0-18.32
  ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
  Uname: Linux 3.11.0-18-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  florin     1726 F.... pulseaudio
  Date: Wed Mar 12 01:16:14 2014
  HibernationDevice: RESUME=UUID=67290dc6-2f7a-446c-9e80-37b3e8688698
  InstallationDate: Installed on 2013-10-19 (143 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  Lsusb:
   Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 10f1:1a2a Importek Laptop Integrated Webcam
   Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: TOSHIBA Satellite C650
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-18-generic root=UUID=63a6fe05-518d-4388-8787-f51a01a3d0c4 ro persistent quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-18-generic N/A
   linux-backports-modules-3.11.0-18-generic  N/A
   linux-firmware                             1.116.2
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/28/2011
  dmi.bios.vendor: INSYDE
  dmi.bios.version: 2.00
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Base Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnINSYDE:bvr2.00:bd06/28/2011:svnTOSHIBA:pnSatelliteC650:pvrPSC14E-00400MG5:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
  dmi.product.name: Satellite C650
  dmi.product.version: PSC14E-00400MG5
  dmi.sys.vendor: TOSHIBA

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