Ubuntu
linux package

  1. Bug #1748408
  2. Comment #0

Comment 0 for bug 1748408

Revision history for this message
Dr. Jens Harbott (j-harbott) wrote : Servers going OOM

We are seeing this on multiple servers after upgrading from previous 4.10 series HWE kernels to the new 4.13 HWE series. With the new kernel, free memory is continously decreasing at a high rate and the servers start swapping and finally OOMing services within days. With the 4.10 kernel, decrease of free memory is slower and stabilizes after a while.

Latest kernel tested is linux-image-4.13.0-32-generic but the issue also affects older kernels from that series, tested back to linux-image-4.13.0-19-generic. No issue with linux-image-4.10.0-42-generic.

The servers are running as OpenStack controller nodes using either Ocata or Pike UCA plus ceph. See attached graph for the memory behaviour.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.13.0-32-generic 4.13.0-32.35~16.04.1
ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Fri Feb 9 09:45:50 2018
ProcEnviron:
 LANGUAGE=en_US:
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)