The default profile is NUMA Static, which changes the default behavior from previous versions of the operating system. RSS predefined profiles are new in Windows Server 2012.

To determine whether a network adapter is RSS-capable, you can view the RSS information on the network adapter properties Advanced Properties tab. In this circumstance, you should use RSS-capable network adapters or disable RSS on the network adapter properties Advanced Properties tab. It is important to note that due to the logic in RSS and Hypertext Transfer Protocol (HTTP) for load distribution, performance might be severely degraded if a non-RSS-capable network adapter accepts web traffic on a server that has one or more RSS-capable network adapters. When all the web traffic is going through the RSS-capable network adapters, incoming web requests from different connections can be simultaneously processed across different CPUs. RSS can improve web scalability and performance when there are fewer network adapters than logical processors on the server. Enabling Receive Side Scaling (RSS) for Web Servers Some network adapters require offload features to be independently enabled for send and receive paths. However, if the reduced throughput is not expected to be a limitation, you should enable offload capabilities, even for this type of network adapter. For example, enabling segmentation offload can reduce the maximum sustainable throughput on some network adapters because of limited hardware resources. Sometimes, however, the network adapter is not powerful enough to handle the offload capabilities with high throughput.

Turning on network adapter offload features is usually beneficial. The following sections describe some of your performance tuning options.

If your network adapter provides tuning options, you can optimize network throughput and resource usage to achieve optimum throughput based on the parameters described above. The server hardware and software resources The type of workload performed by the server Performance Tuning for Low Latency Packet Processingĭetermining the correct tuning settings for your network adapter depend on the following variables: This topic contains the following sections.Įnabling Receive Side Scaling (RSS) for Web Servers

Interrupt moderation enable or disable