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PVE Host Swaps, when it has a lot of memory available

Hi,

Just noticed, that proxmox Host PVE swaps, when it has a lot of memory. /proc/userbeancounters fails show 0 for every host. Why this could happen?

Memory usage is like: committed 7, total 14, swaped 1,5 GB.

Code:

pve-manager: 2.2-26 (pve-manager/2.2/c1614c8c)
running kernel: 2.6.32-16-pve
proxmox-ve-2.6.32: 2.2-80
pve-kernel-2.6.32-11-pve: 2.6.32-66
pve-kernel-2.6.32-16-pve: 2.6.32-80
lvm2: 2.02.95-1pve2
clvm: 2.02.95-1pve2
corosync-pve: 1.4.4-1
openais-pve: 1.1.4-2
libqb: 0.10.1-2
redhat-cluster-pve: 3.1.93-1
resource-agents-pve: 3.9.2-3
fence-agents-pve: 3.1.9-1
pve-cluster: 1.0-28
qemu-server: 2.0-64
pve-firmware: 1.0-21
libpve-common-perl: 1.0-37
libpve-access-control: 1.0-25
libpve-storage-perl: 2.0-34
vncterm: 1.0-3
vzctl: 4.0-1pve2
vzprocps: 2.0.11-2
vzquota: 3.1-1
pve-qemu-kvm: 1.2-7
ksm-control-daemon: 1.1-1

Processes sorted by SWAP usage:
Code:

    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  SWAP COMMAND
  7446 root      20  0 1283m 404m 1984 S    5  2.9  5106:54 879m kvm
 260223 root      20  0  773m  70m 2412 S    4  0.5  5218:39 703m kvm
  6893 root      20  0  871m 367m 2412 S    2  2.6  5030:06 504m kvm
  7541 root      20  0  580m  81m 2412 S    3  0.6  5155:20 499m kvm
  7617 root      20  0  863m 370m 2424 S    6  2.6  7540:55 492m kvm
  5706 root      20  0  640m 235m 2412 S    3  1.7  4771:37 405m kvm
  1531 root      20  0  381m 1364  828 S    0  0.0  56:50.17 380m rrdcached
  7382 root      20  0 1064m 703m 2420 S  24  5.0  32478:19 360m kvm
  1554 root      20  0  336m  19m  18m S    1  0.1 325:48.87 317m pmxcfs
 854368 www-data  20  0  294m 5436 1496 S    0  0.0  0:00.17 289m apache2
 854367 www-data  20  0  293m 5428 1492 S    0  0.0  0:00.18 288m apache2

If I go inside a KVM Guest, I don't see any SWAP usage nor high memory usage.

As an example, the free output from machine that runs under process PID 260223
Code:

            total      used      free    shared    buffers    cached
Mem:        767512    694528      72984          0      99384    245136
-/+ buffers/cache:    350008    417504
Swap:      1048568        92    1048476


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