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[Søren Holm <sgh@xxxxxx>]

Look at the this graph

http://sgh.dk/~sgh/cpustat_month.png

This is a machine that it not doing anything cpu intensive.

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https://bugs.launchpad.net/bugs/1462919

Title:
  kswapd pulls server down every 2 weeks.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  in 15.04 even when having plenty of RAM and swap kswpd uses lots of
  CPU and might bring the machine down to a crawl making is unable to
  access it over the network.

  I say "might", because it's only a very clear feeling that I have. I
  do not know it for sure.

  Anyway the fact is that I have two server that once every 2 week ends
  up totally unaccessible from the network. They can be pinged though.
  Logging in locally takes a long time. Rebooting them locally takes a
  long time. They have absolutely no noticeable disk IO when in this
  stalled state.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic 3.19.0-16.16
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 jun  8 09:57 seq
   crw-rw---- 1 root audio 116, 33 jun  8 09:57 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Mon Jun  8 10:02:44 2015
  HibernationDevice: RESUME=UUID=17183f57-6587-47f2-84dc-553f7e5cf3a8
  IwConfig:
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Intel Corporation S5520UR
  PciMultimedia:
   
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic root=/dev/mapper/vg0-root ro nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-18-generic N/A
   linux-backports-modules-3.19.0-18-generic  N/A
   linux-firmware                             1.143.1
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-05-16 (22 days ago)
  dmi.bios.date: 12/17/2009
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: S5500.86B.01.00.0046.121720091524
  dmi.board.asset.tag: ....................
  dmi.board.name: S5520UR
  dmi.board.vendor: Intel Corporation
  dmi.board.version: E22554-606
  dmi.chassis.asset.tag: ....................
  dmi.chassis.type: 23
  dmi.chassis.vendor: ...............................
  dmi.chassis.version: ..................
  dmi.modalias: dmi:bvnIntelCorp.:bvrS5500.86B.01.00.0046.121720091524:bd12/17/2009:svnIntelCorporation:pnS5520UR:pvr....................:rvnIntelCorporation:rnS5520UR:rvrE22554-606:cvn...............................:ct23:cvr..................:
  dmi.product.name: S5520UR
  dmi.product.version: ....................
  dmi.sys.vendor: Intel Corporation

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