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

[Markus Stockhausen]

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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