Public bug reported: Symptoms are that as time goes by I/O gets slower and slower (primarily if not even only writes rather than reads). It can be temporarily cured via /sbin/sysctl -w vm.drop_caches=2 and/or /sbin/sysctl -w vm.drop_caches=3 but the problem will re-appear again sooner rather than later. The problem seems also somewhat proportional on how much RAM is allocated. It does not seem to appear with less than 8GB (i.e., i saw it first when switching to a 16GB laptop/ThinkPad w530) and is considerably worse when allowing all memory compared to, e.g., by using only ~14GB using the mem=14000M boot option. The issue shows up at least since 12.10
This is almost certainly the same bug as https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1107150 but as that bug is now strangely closed and i got told to open a new one, here we go ... ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-18-generic 3.11.0-18.32 ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4 Uname: Linux 3.11.0-18-generic i686 NonfreeKernelModules: nvidia wl ApportVersion: 2.12.5-0ubuntu2.2 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: msteiner 4131 F.... pulseaudio /dev/snd/controlC0: msteiner 4131 F.... pulseaudio /dev/snd/pcmC0D0p: msteiner 4131 F...m pulseaudio /dev/snd/seq: timidity 3237 F.... timidity CRDA: country IN: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20) (5250 - 5330 @ 40), (N/A, 20), DFS (5735 - 5835 @ 40), (N/A, 20) Date: Mon Mar 10 17:47:12 2014 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=4a17fffe-b487-4abf-9df8-1846a925cf4b MachineType: LENOVO 2449A35 MarkForUpload: True ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-18-generic root=/dev/mapper/babbage2-root ro acpi_osi=Linux mem=14000M nox2apic rcutree.rcu_idle_gp_delay=1 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-3.11.0-18-generic N/A linux-backports-modules-3.11.0-18-generic N/A linux-firmware 1.116.2 SourcePackage: linux UpgradeStatus: Upgraded to saucy on 2013-10-25 (135 days ago) dmi.bios.date: 05/24/2013 dmi.bios.vendor: LENOVO dmi.bios.version: G5ET93WW (2.53 ) dmi.board.asset.tag: Not Available dmi.board.name: 2449A35 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG5ET93WW(2.53):bd05/24/2013:svnLENOVO:pn2449A35:pvrThinkPadW530:rvnLENOVO:rn2449A35:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2449A35 dmi.product.version: ThinkPad W530 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: apport-bug i386 saucy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1290337 Title: I/O slow down on 32-bit PAE systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1290337/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
