Memory Usage Increases When Restarting DomU (Doc ID 2077074.1)

Last updated on MARCH 08, 2017

Applies to:

Oracle VM - Version 3.3.2 to 3.3.3 [Release OVM33]
Information in this document applies to any platform.

Symptoms

On : 3.3.2 version, DomU, Guest VM, Virtual Machine

ACTUAL BEHAVIOR
---------------
When restarting VM's notice that the memory usage increases each time

# xm list | egrep 'Name|0004fb0000060000acb571a1468f3af8'
Name ID Mem VCPUs State Time(s)
0004fb0000060000acb571a1468f3af8 122 1030 1 -b---- 28.5

$ free
  total used free shared buffers cached
Mem: 1019088 110212 908876 184 9924 49896
-/+ buffers/cache: 50392 968696
Swap: 2097148 0 2097148

* reboot DomU *

# xm list | egrep 'Name|0004fb0000060000acb571a1468f3af8'
Name ID Mem VCPUs State Time(s)
0004fb0000060000acb571a1468f3af8 123 1033 1 -b---- 12.0

$ free
  total used free shared buffers cached
Mem: 1022580 106440 916140 184 8372 47652
-/+ buffers/cache: 50416 972164
Swap: 2097148 0 2097148

* reboot  *

# xm list | egrep 'Name|0004fb0000060000acb571a1468f3af8'
Name ID Mem VCPUs State Time(s)
0004fb0000060000acb571a1468f3af8 124 1036 1 -b---- 11.9

$ free
  total used free shared buffers cached
Mem: 1025652 108416 917236 184 8540 49488
-/+ buffers/cache: 50388 975264
Swap: 2097148 0 2097148

-> see that mem increases from 1030 to 1036 on the subsequent restarts.
Memory usage also goes above the allocated memory in the vm configuration

EXPECTED BEHAVIOR
-----------------------
Memory usage should remain identical

STEPS
-----------------------
The issue can be reproduced at will with the following steps:
1. note down memory usage of windows VM
2. reboot the VM
3. note that the memory usage has increased.


Cause

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