How to bring my windows AKS windows node back to sanity (memory wise) after having run a very RAM intensive workload?

[MarkKharitonov]

I have an AKS windows node pool. Here is its host memory breakdown before running the heavy RAM intensive workload for over 4 hours:

PS C:\hpc> Get-Counter "\Memory\Pool Nonpaged Bytes", "\Memory\Pool Paged Bytes", "\Memory\System Cache Resident Bytes", "\Memory\Modified Page List Bytes", "\Process(_Total)\Working Set" |
>> Select-Object -ExpandProperty CounterSamples |
>> Select-Object Path, @{Name = 'SizeGB'; Expression = { '{0:N2} GB' -f ($_.CookedValue / 1GB) } }

Path                                               SizeGB
----                                               ------
\\akswin2000001\memory\pool nonpaged bytes         0.56 GB
\\akswin2000001\memory\pool paged bytes            0.85 GB
\\akswin2000001\memory\system cache resident bytes 0.38 GB
\\akswin2000001\memory\modified page list bytes    0.14 GB
\\akswin2000001\process(_total)\working set        4.35 GB

Here it is 25 hours after the heavy workload finished:

Get-Counter "\Memory\Pool Nonpaged Bytes", "\Memory\Pool Paged Bytes", "\Memory\System Cache Resident Bytes", "\Memory\Modified Page List Bytes", "\Process(_Total)\Working Set" |
Select-Object -ExpandProperty CounterSamples |
Select-Object Path, @{Name = 'SizeGB'; Expression = { '{0:N2} GB' -f ($_.CookedValue / 1GB) } }

Path                                              SizeGB
----                                              ------
\\akswin000001\memory\pool nonpaged bytes         5.80 GB
\\akswin000001\memory\pool paged bytes            11.38 GB
\\akswin000001\memory\system cache resident bytes 2.84 GB
\\akswin000001\memory\modified page list bytes    0.14 GB
\\akswin000001\process(_total)\working set        6.01 GB

The extra 2GB of the total process memory is not a concern (the heavy container is idle, but still takes up memory)

What is a concern is that the kernel memory is not released. And I have no idea how to deal with it except restart the node.

Are there any other options here?