[ovirt-users] ksmd high cpu usage from almost a week with just one vm running

[mad Engineer]

Thanks for the info Markus

free -g
             total       used       free     shared    buffers     cached
Mem:        47         32         14          0           0             0

% of usage  is 68  .

Why is ksmd not sleeping.Do you have any idea?
regards,


On Sat, Dec 6, 2014 at 8:45 PM, Markus Stockhausen
<stockhausen at collogia.de> wrote:
> Memory usage > 80%: ksm kicks in. There it will run at full speed until
> usage is below 80%. There is an open BZ from me. Bad behaviour is controlled
> by mom.
>
> Markus
>
> Am 06.12.2014 15:58 schrieb mad Engineer <themadengin33r at gmail.com>:
>
> Hello All,
>              I am using centos6.5 x64 on a server with 48 G RAM and 8
> Cores.Managed by Ovirt
> There is only one running VM with RAM 34 G and with 6 VCPU (pinned to
> proper numa nodes)
>
> from top
>
> top - 06:42:48 up 67 days, 20:05,  1 user,  load average: 0.26, 0.20, 0.17
> Tasks: 285 total,   2 running, 282 sleeping,   0 stopped,   1 zombie
> Cpu(s):  1.0%us,  1.4%sy,  0.0%ni, 97.5%id,  0.1%wa,  0.0%hi,  0.0%si,
> 0.0%st
> Mem:  49356468k total, 33977684k used, 15378784k free,   142812k buffers
> Swap: 12337144k total,        0k used, 12337144k free,   343052k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>   101 root      25   5     0    0    0 R 27.4  0.0   5650:04 [ksmd]
> 26004 vdsm       0 -20 3371m  64m 9400 S  9.8  0.1   1653:27
> /usr/bin/python /usr/share/vdsm/vdsm --pidfile /var/run/vdsm/vdsmd.pid
> 20963 qemu      20   0 38.5g  33g 6792 S  3.9 71.6   5225:43
> /usr/libexec/qemu-kvm -name Cinder -S -M rhel6.5.0 -cpu Nehalem
> -enable-kvm -m 34096 -realtime mlock=off -smp
> 6,maxcpus=160,sockets=80,c
>
> from /sys/kernel/mm/ksm
> pages_unshared  7602322
> pages_shared     207023
> pages_to_scan   64
> pages_volatile    31678
>
> Any idea why ksmd is not coming to normal CPU usage ,on a different
> server ksmd was disabled and for testing when i enabled it initially
> CPU usage was high but later settled down to 3% ,in that host i have 4
> VMs running.
>
> Before turning off ksmd can any one help me find out why ksmd is
> behaving like this.Initially it had 2 virtual machines,because of high
> CPU utilization of this guest other is migrated to another host.
>
> Thanks
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