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3586539 - LNX: vm.swappiness setting for SAP Application servers

Symptom

On Linux the vm.swappiness kernel parameter can be used to control the tendency of the OS to swap out memory instead of freeing it up, in case of memory demand.

In some situations vm.swappiness was set to 0, to control swapping activity on the server.

Possible side effects of the setting:

  • high CPU usage
  • high paging activity
  • system crash
  • out-of-memory crash (with signal 9) on SAP processes


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Environment

  • SAP Netweaver (any version)
  • SAP S/4HANA  (any version)
  • Linux (any distribution and version)

Product

SAP NetWeaver all versions ; SAP S/4HANA all versions

Keywords

linux, oom, cpu, paging, swapping, swappiness, vm.swappiness, swap , KBA , BC-OP-LNX , Linux , Problem

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