We are currently running with 2 PVS 7.6 servers, and have reports that there are momentary freezes within the XenDesktop environment. When investigating, I noticed an unusually high number of retries within PVS. None of these retries occur during boot up, and gradually climb over the up time of the VM.
We are running XenDesktop 7.6 hosting VMs on both XenServer and VMware hypervisors. All networking is done over 10Gbps with little to no latency (<1ms). To give everyone an idea for the number of retries, I pulled the data from a couple of VMs.