I've deployed UDT VM on a XenServer host which runs four other VMs. I have set UDT to monitor all our Alcatel-Lucent switches using SNMP with default polling options. When the UDT VM is running the networking starts running very slowly. We have several applications that run over the network and these are now taking a long time to do anything. Turn the UDT VM off and everything returns to normal. The switches CPU and RAM seem to be the same when UDT is on or off.
I'm wondering what the cause of this slowness is and what I can do to resolve it. It occurs to me that UDT may prefer to be run on bare metal. Should running UDT as a XenServer VM be okay? What could be causing the networking to run so slow?