[evook]

There is an experimental flag[0] in the .wslconfig which let's you set autoMemoryReclaim to gradual or dropcache. On my laptop I had good success with dropcache and on my countryside desktop with gradual.

[0] https://learn.microsoft.com/en-us/windows/wsl/wsl-config#exp...

[nikau]

You can do this manually by doing echo 1 > /proc/dropcaches or something along those lines