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OOM Killer Invoked after SLE12 Upgrade

This document (7022353) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12


After upgrading from any SLES11 to any SLES12 version, the system became unstable and was running out of memory. Messages about the out of memory killer being invoked were observed.

2017-11-08T18:05:25.713556-02:00 db2p121 kernel: lsof invoked oom-killer: gfp_mask=0x14280ca(GFP_HIGHUSER_MOVABLE|__GFP_ZERO), nodemask=0, order=0, oom_score_adj=0

The sysctl -a | grep swappiness shows:



You can add memory to the server and/or Increase swappiness to 5 or 10 to allow some swapping.

Edit /etc/sysctl.conf and add:


Reboot the server.


Swappiness is handled a bit differently in SLE12. In SLE11 a little bit of swapping was allowed even if vm.swappiness=0, but in SLE12 no swapping is allowed when vm.swappiness=0

Additional Information

2017-11-17: Jason Record - Initial Document


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  • Document ID:7022353
  • Creation Date: 17-Nov-2017
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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