uwfmgr with excluded directory increases RAM usage

Question

While using the Unified write filter on IoT Windows 10 the RAM usage is increasing.

On the drive C:\ProgramData\VHD is execluded from filter.

uwfmgr.exe file add-exclusion "C:\ProgramData\VHD"

Current state of RAM usage on uwfmgr: uwfmgr overlay Get-Consumption: 20MB

When now writing Data to C:\ProgramData\VHD\Samples.vhd the RAM usage is increasing to 2GB, then the system will break down.

Current state of RAM usage on uwfmgr: uwfmgr overlay Get-Consumption: 2048MB

The question is not to incease the RAM limit. The question is how to avoid using uwfmgr RAM while writing on harddisk in excluded area.

score 2 · Accepted Answer · answered Apr 08 '21 at 08:15

After the filter functionality in Windows 7 to Windows 8, Microsoft changed the usage of the filter. All written data has no more passthrough, even if they are in excluded list.

https://learn.microsoft.com/en-us/windows-hardware/customize/enterprise/uwfoverlay

https://learn.microsoft.com/de-de/windows-hardware/customize/enterprise/unified-write-filter

The change is not planned to revert back like on Windows 7 EWF

There can be a workaround to use different harddisk, which is execluded automatically in Microsoft write filter.

uwfmgr with excluded directory increases RAM usage

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