The real minimum requirements for a WSUS server? RRS feed

  • Question

  • I have an old Dell PowerEdge 2900 with 6 GB of memory, dual-core 2 ghz 64-bit Xeon, and 600 GB of 10,000 RPM of RAID 5 SAS 6gb/sec.

    This exceeds the specified minimum requirements for WSUS, of a 1.4 ghz CPU, "2 GB memory above what the OS needs", 10 GB minimum disk space, described here:


    I am using Server 2016 64-bit in evaluation mode, and have onlys installed WSUS.

    For the test environment I have selected All Products and have let it do its thing synchronizing with Microsoft.


    This system is incredibly slow. It will regularly pound one of the two CPU cores at a solid 100% for hours, usually SQL server being the culprit. (It does not seem to be multi-core aware.)

    After letting it run on its own until it finally settles down hours later, attempting to view the Synchronization status page again pounds one of the cores at 100%, and eventually the console stops waiting and instead shows me an error message of "Connection Error", and an option to "Reset Server" to try again.


    It will do this repeatedly, and it seems like no amount of waiting will ever allow the console to be happy about the situation.

    Either the WSUS console timeout waiting for SQL server completion is too short, or the so-called minimum requirements to run WSUS are a joke.

    Saturday, April 28, 2018 3:25 PM

All replies

  • Hi,

    I'm not sure I can understand your situation.
    Please refer to the following article:
    Determine WSUS Capacity Requirements


    Ashidacchi -- http://hokusosha.com/

    Sunday, April 29, 2018 3:33 AM
  • Hi,

    I'm not sure if the cpu is too old so that some hardware compatibility issues.
    First, you could keep this wsus server updated with the latest updates.
    In addition, there is no other hosting services on the WSUS server, so you could try to manually set multi-core options in SQL(e.g.)

    Also you could open PowerShell and run command "Get-WindowsUpdateLog" to get windows update log 
    By default you should get the WindowsUpdate.Log file on your desktop .
    Please check if there is more details information in that log .

    Please remember to mark the replies as answers if they help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, April 30, 2018 1:56 AM