Excessive Memory usage on Windows Clients

[backup]

Hi,
We have a severe problem with Urbackup clients (Windows).
When taking image backup, we see UrBackup Client absorbing all available memory within a minute and after a while the PC becomes veeerrrrry slow (e.g. 3 minutes to open the start menu).
This happens exactly when the image backup starts and keeps as long as the backup is in progress. If we stop the backup, the PC gets responsive again.

I have tried installing older client versions in 2 PCs, same behavior (2.5.24, 2.5.23, 2.5.21).

I have not found anything in the forum for Windows clients, except of a few unanswered posts.
What I have found is that for linux clients, we could edit the /usr/lib/systemd/system/urbackupclientbackend.service file to set specific values on a few MemoryXYZ variables, e.g.:
MemoryAccounting=true
MemoryHigh=2G
MemoryMax=3G
MemorySwapMax=512M

Is there any similar configuration option for Windows Clients?

We have checked and the bottleneck is not the server. The same thing happens either with a maximum of 1 concurrent backups or more. Server resources seem normal.
I have also tried disabling windows swap file, same results.

All client PCs are on Windows 10 or 11, on Gigabit Ethernet, last version 2.5.25
Urbackup Server 2.5.33 runs on Linux, 10Gb Ethernet.

[uroni]

Could you check in details if Windows accounts the memory to the UrBackup process?

[backup]

Thanks for the question, I am not sure for that, but I tried at least 10 times to start image backup on 4 different clients. All had 16 or 32 GB of RAM and went from ~“6GB used” to maximum in about 1 minute since the image backup started.

Also, some times this excessive memory usage just does not happen. It may depend on some Windows System state.

Is it possible to alter configuration to send maximum of memory usage in Windows Urbackup clients, as it is with Linux clients?