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Home > Success Center > User Device Tracker (UDT) > UDT - Knowledgebase Articles > TCP is causing slow performance on Windows Server 2008

TCP is causing slow performance on Windows Server 2008

Updated November 29, 2016


If Orion is installed on Windows Server 2008 or Windows Vista and there are any devices on your network (between your Server and your database server) that do not support RFC 1323, TCP Extensions for High Performance, the TCP window size auto-tuning feature of Windows Server 2008 and Windows Vista may prevent your server from successfully connecting with your Orion Platform database. This TCP auto-tuning feature is intended as a network-sensitive restriction, applied by the receiver(your Server) on the amount of data it is allowed or able to receive. If any devices along the network path between your Server and your Orion Platform database do not support the TCP window scaling detailed in RFC 1323, the allowed size of the TCP window in packets sent to your Server may not match the TCP window size reported by packets sent from your Server. This mismatch may lead to failed connections between your Server and your Orion Platform database. The following procedure disables this TCP auto-tuning feature, resetting the TCP receive window to 64kB.



  • All UDT versions
  • Windows Server 2008 



TCP is enabled which prevents your server from connecting to your Orion Platform database.



  1. Click Start > All Programs > Accessories.
  2. Right-click Command Prompt, and then click Run as administrator.
  3. If you are prompted by User Account Control, click Continue to open the elevated command prompt.

Note: In some cases, having User Account Control (UAC) enabled on Windows Server 2008 and Windows Vista (evaluation-only) can lead to installation errors. For more information about disabling UAC, see Disable User Account Control (UAC).
   4. At the prompt, enter the following:netsh interface tcp set global autotuninglevel=disabled
   5. Close the command prompt window, and then restart your Server.

Disclaimer: Please note, any content posted herein is provided as a suggestion or recommendation to you for your internal use. This is not part of the SolarWinds software or documentation that you purchased from SolarWinds, and the information set forth herein may come from third parties. Your organization should internally review and assess to what extent, if any, such custom scripts or recommendations will be incorporated into your environment.  You elect to use third party content at your own risk, and you will be solely responsible for the incorporation of the same, if any.




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