Memory leak in Windows?

K

koppah

Bit poster
When running Windows ARM in Parallels, I'm seeing the system bounce up to 100% memory usage and stay there, then come back and immediately jump back up, even with no apps running. This is causing Windows to slow to a crawl, and I can see that the Parallels Desktop process in MacOS is using over 12GB of memory, even though my system only has 8GB. Additionally, this happens if I increase the VM's allowed memory from 4GB to 6GB.
It seems like there may be a Parallels driver that's leaking a lot of memory in Windows and causing it to run terribly.
 
I've got the same issue. Just created a new VM and memory was fine - installed Parallels Tools and it's back at 95%. No apps or anything else installed, so definitely looks like a driver issue.
 
Michael Pitt said:
I've got the same issue. Just created a new VM and memory was fine - installed Parallels Tools and it's back at 95%. No apps or anything else installed, so definitely looks like a driver issue.
Click to expand...
Was the VM usable without Parallels Tools? I tried uninstalling and the experience isn't great...
 
Just noticed the exact same thing here. M1 MacBook Pro with 16 GB of memory, of which 6 GB is allocated to the Windows 10 ARM VM. The macOS Activity Monitor shows Parallels Desktop using around 160 MB, while Windows 10 is shown as using 12.39 GB!!
 
Update: with 6 GB of memory assigned to the Win10 ARM VM, Activity Monitor said Win10 was using 12.39 GB of memory. If I reduce the amount of memory assigned to the VM to 5 GB, Win10 memory usage according to Activity Monitor falls to around 10 GB; if I reduce it 4 GB, Win10 memory usage falls to... you guessed it, around 8 GB.
So it seems Activity Monitor is reporting Windows 10 as using approximately twice the amount of memory assigned to it.
 
I have the very same issue with 4GB assigned, yet Activity Monitor states that Windows 10 is using 8GB, when I only have the 8GB M1 Air. Is there any upcoming fix for this memory leak?
 
Looks like if you go into Task Manager's Performance tab, you can see that the 'Commit' value seems to match with the amount of RAM that Parallels is using....
 
I'm seeing an incorrect value for memory speed in Task Manager of my Parallels VM. System Report shows 2667 MHz while Windows Task Manager is only showing 667MHz.
 

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The support gave me advice to remove parallels tools from windows. It helped. There are no memory leak now in Windows.
 
Hello guys, thanks a lot for the provided information.
We've involved Parallels Engineering Team in this case for the further issue investigation.
Once we get any updates we will let you know.
Thank you once again.
 
DmitrijG said:
The support gave me advice to remove parallels tools from windows. It helped. There are no memory leak now in Windows.
Click to expand...
Unfortunately for me with my MacBook Pro M1 it didn't solve the issue :(

This is my RAM directly after booting the VM. Without running any applications.
upload_2021-6-12_9-26-45.png
 
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