When WSUS downloads are slow. WSUS uses BITS for downloading updates, and it does so in background mode. Unfortunately, this utilizes remaining bandwidth of the server instead of its full capacity. To speed up WSUS downloads, you can configure BITS in WSUS to use foreground priority.
When to use foreground or background BITS priority
The default Background Intelligent Transfer Service (BITS) mode for WSUS is background priority mode. As written in Microsoft Docs:
Unless the job is time critical or the user is actively waiting, you should always use a background priority. However, there are times when you may want to switch from background priority to foreground priority.
Best Practices When Using BITS
If you feel your WSUS updates download take too long to complete, you can switch to foreground priority. This may speed up WSUS.
Speed up WSUS update downloads by switching to BITS foreground priority
So, to speed up the download of WSUS updates through BITS, configure it to foreground priority. In Powershell you can do this quite easily:
$Configuration=(Get-WSUSServer).GetConfiguration()
$Configuration.BitsDownloadPriorityForeground=$True
$Configuration.Save()
(get-wsusserver).GetConfiguration()Whenever you want to switch back to normal background BITS priority, set BitsDownloadPriorityForeground back to $false.
You can get its current value using:
(get-wsusserver).GetConfiguration().BitsDownloadPriorityForegroundThis will show you whether the setting has been enabled (True) or not (False).
There is also option to increase the download limit by doing the following:
$Configuration=(Get-WSUSServer).GetConfiguration()
$Configuration.BitsDownloadPriorityForeground=$True
$Configuration.MaxSimultaniousFileDownload =
$Configuration.Save()
and also to update the value in BITS configuration in the following Reg value
HKLM\Software\Policies\Microsoft\Windows\BITS\MaxJobsPerMachine
to
After that restart the BITS service, and start sync process
U will see that the number of BITS jobs increased and the download rate became faster
Very interesting Tankwell, thanks! I can imagine increased values for MaxSimultaniousFileDownload and MaxJobsPerMachine improves WSUS performance in larger enterprise networks, correct? In my env, MaxSimultaniousFileDownload defaults to 10 and MaxJobsPerMachine to 300.
Here you can find (almost?) all BITS registry settings: https://getadmx.com/HKLM/Software/Policies/Microsoft/Windows/BITS