** Attachment added: "linux-48036.oom7.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1666260/+attachment/4827641/+files/linux-48036.oom7.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1666260 Title: "Out of memory" errors after upgrade to 4.4.0-59 + 4.8.0-34 Status in linux package in Ubuntu: Confirmed Bug description: Same as #1655842 - Started seeing oom-killer on multiple servers upgraded to 4.4.0-59. Unlike #1655842, also seeing the same oom-killer on multiple servers updated to 4.8.0-34. First upgraded them all 4.8 servers 4.8.0-36, then downgraded a few to 4.4.0-63. I am seeing an even more pronounced change in the memory usage, so I can only assume that 4.4.0-63 is also bugged with the same problem as 4.4.0-59 and 4.8.0-34. Either because #1655842 is not fixed, or it is only fixed for certain kinds of workloads. These are the changes I'm seeing in our memory graphs between 4.4.0-59 and 4.4.0-63/4.8.0-34. The symptoms I'm seeing are: Upgrading 4.4.0-57 -> 4.4.0-59: - /proc/meminfo:Buffers: Up from 9GB to 15GB - /proc/meminfo:Cached: Up from 5GB to 10GB - /proc/meminfo:SReclaimable: Down from 15GB to 5GB - /proc/meminfo:SUnreclaim: Staying at 50MB Upgrading 4.4.0-57 -> 4.4.0-63: - /proc/meminfo:Buffers: Up from 9GB to 26GB - /proc/meminfo:Cached: Down from 5GB to 300MB - /proc/meminfo:SReclaimable: Down from 15GB to 2GB - /proc/meminfo:SUnreclaim: Down from 50MB to 30MB Upgrading 4.4.0-57 -> 4.8.0-34: - /proc/meminfo:Buffers: Up from 9GB to 14GB - /proc/meminfo:Cached: Down from 5GB to 2GB - /proc/meminfo:SReclaimable: Down from 15GB to 14GB - /proc/meminfo:SUnreclaim: Staying at 50MB Setting vm.vfs_cache_pressure = 300 seems to have a positive effect of not causing OOMs. Downgrading to 4.4.0-57 also works. Will also note that I haven't had a definitive OOM in 4.4.0-63. But the shift in memory usage is far too much from what I expect to be normal on these particular servers where I'm experiencing crashes. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-63-generic 4.4.0-63.84 ProcVersionSignature: Ubuntu 4.4.0-63.84-generic 4.4.44 Uname: Linux 4.4.0-63-generic x86_64 AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' Date: Mon Feb 20 16:15:56 2017 InstallationDate: Installed on 2012-06-04 (1721 days ago) InstallationMedia: IwConfig: lo no wireless extensions. eth0 no wireless extensions. Lsusb: Error: [Errno 2] No such file or directory: 'lsusb' MachineType: System manufacturer System Product Name PciMultimedia: ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-63-generic root=UUID=b790930f-ad81-4b27-a353-a4b3d6a29007 ro nomodeset nomdmonddf nomdmonisw RelatedPackageVersions: linux-restricted-modules-4.4.0-63-generic N/A linux-backports-modules-4.4.0-63-generic N/A linux-firmware 1.157.8 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to xenial on 2017-02-16 (4 days ago) dmi.bios.date: 10/17/2011 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1106 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H67-M PRO dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1106:bd10/17/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP8H67-MPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1666260/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
