I am uncertain about the more modern Windows OS like 8.1 and Server 2012. However, auto-tuning did not work correctly in Windows 7 and Server 2008 R2. One of the biggest symptoms was that GUI-based copy/paste between Windows 7 workstations and Server 2008 R2 servers would fail or creep along very slowly (think of copying a file to the company share or your home drive). Disabling auto-tuning, receive-side scaling, and heuristics almost eliminated the issue for me. If your environment consists of these particular operating systems, then you will want to disable auto-tuning, receive side scaling, and heuristics on both the workstations and servers. There is a hotfix but it may be just as easy to either script it or do it manually.
It is an easy fix and won't interrupt production.
EDIT: Has to be done with elevated privileges.
Windows Tcp Tuning
TCP AutoTuning enables TCP window scaling by default and automatically tunes the TCP receive window size for each individual connection based on the bandwidth delay product (BDP) and the rate at which the application reads data from the connection, and no longer need to manually change TcpWindowSize registry key value which applies to all connection. Theoretically, with TCP auto-tuning, network connection throughput in Windows. Apr 14, 2020 The Receive Window Auto-Tuning feature lets the operating system continually monitor routing conditions such as bandwidth, network delay, and application delay. Therefore, the operating system can configure connections by scaling the TCP receive window to. Apr 13, 2011 I know that “auto tuning” is one of the features introduced with windows 7/vista to improve OS operations on network. Basically what it does is, it adjusts the TCP window size to improve the network operations. (Windows auto-tuning uses TCP window scaling dynamically.) For special network appliances, like firewalls, proxies, accelerators, etc., they might 'transparently' sit in the middle of a TCP flow, and if they don't support TCP window scaling (used by Windows auto-tuning), auto-tuning cannot function as intended. View solution in original post.
Tcp Windows Auto Tuning
Nov 24, 2015 Disabling Windows TCP autotuning. On Nov 24, 2015 at 11:43 UTC. Windows Server. I am uncertain about the more modern Windows OS like 8.1 and Server 2012. However, auto-tuning did not work correctly in Windows 7 and Server 2008 R2. One of the biggest symptoms was that GUI-based copy/paste between Windows 7 workstations. Apr 24, 2014 Windows 2012 R2 unstable internet connection I had 2x HP DL 380 G6 servers with Windows 2012 R2 whit the same problem. When I start a download (I try a lot of different sites) the download drops and fluctuate. May 05, 2016 TCP Auto-tuning slow network performance Starting with Windows Vista, there were improvements made to the network stack including a little known feature called TCP Window Auto-tuning. The auto-tuning feature allows newer versions of Windows to be able to adjust the RWIN value automatically on the fly so to speak.