Increase VMBus buffer sizes to increase network throughput to guest VMs

Under load, the default buffer size used the by the virtual switch may provide inadequate buffer and result in packet loss. We recommend increasing the VM bus receive buffer from 1Mb to 2Mb. Traffic jams happen every day, all across the world. Too many vehicles competing for the same stretch of road, gated by flow control…


NT... TTCP! Network Performance Test Tool Available

NTttcp (Windows port of Berkley’s TTCP winsock based test tool) has officially gone live ( on  NTttcp is a useful tool to help measure overall Windows networking performance with a multitude of networking adapters in different configurations.  I encourage you to install the tool today and start measuring your network throughput and efficiency.   Ahmed TalatPerformance ManagerWindows Server Performance Team