recent change 54d169503ae903f1ccd4e2d60fc945b080d60ac7 introduced a debug line in stats which generates a log line every single time it samples a VM.
This needs to be changed to on-time warning instead, pretty much like msivak's iotune patch
GuestMonitor-vm_1::DEBUG::2014-07-13 17:56:50,551::vm::423::vm.Vm::(_getUserCpuTuneInfo) vmId=`8be16854-2bc9-49dd-a5c5-8ea38536be99`::Domain Metadata is not set
the same applies to the following exception which was also added as part of the original code:
Thread-94::ERROR::2014-07-13 17:56:22,833::vm::319::vm.Vm::(_sampleCpuTune) vmId=`8be16854-2bc9-49dd-a5c5-8ea38536be99`::Failed to retrieve QoS metadata
Verified on vdsm-188.8.131.52-1.el6ev.x86_64
No any lines like above found on vdsm.log