wsl

• wsl2 filesystem performance is much slower than wsl1 in /mnt
• Status

workaround#

Prefer ~/ over /mnt when filesystem performance is needed

• WSL 2 consumes massive amounts of RAM and doesn’t return it

yolo#

Force linux to drop the page cache

        
bash
        

            
        
     
echo 1 | sudo tee /proc/sys/vm/drop_caches

• GitHub

limit memory assigned to WSL2 VM#

Create a %UserProfile%\.wslconfig file

        
ini
        

            
        
     
[wsl2]
memory=6GB
swap=0
localhostForwarding=true

• GithHub

Controlled via /etc/wsl.conf:

        
ini
        

            
        
     
[interop]
enabled=true
appendWindowsPath=false

More info

Inside ~/.gitconfig:

        
ini
        

            
        
     
[diff]
        tool = bcomp
[difftool]
        prompt = false
[difftool "bcomp"]
        path = "/mnt/c/Program\\ Files/Beyond\\ Compare\\ 4/BCompare.exe"
        cmd = "/mnt/c/Program\\ Files/Beyond\\ Compare\\ 4/BCompare.exe" "$(wslpath -aw $LOCAL)" "$(wslpath -aw $REMOTE)"
[merge]
        tool = bcomp
[mergetool]
        prompt = false
[mergetool "bcomp"]
        path = "/mnt/c/Program\\ Files/Beyond\\ Compare\\ 4/BCompare.exe"
        cmd = "/mnt/c/Program\\ Files/Beyond\\ Compare\\ 4/BCompare.exe" "$(wslpath -aw $LOCAL)" "$(wslpath -aw $REMOTE)" "$(wslpath -aw $BASE)" "$(wslpath -aw $MERGED)"

Running into EMFILE errors because too many files open? (looking at you npm i):

        
bash
        

            
        
     
mylimit=8000
sudo prlimit --nofile=$mylimit --pid $$; ulimit -n $mylimit
su $USER

or

        
bash
        

            
        
     
sudo prlimit -p "$$" --nofile=10000:10000
exec $SHELL
ulimit -n 10000

WSL2 clock drifts if left open when Windows sleeps. Fix with:

        
bash
        

            
        
     
sudo hwclock -s

In powershell, to port-forward:

        
powershell
        

            
        
     
netsh interface portproxy add v4tov4 listenport=3000 listenaddress=0.0.0.0 connectport=3000 connectaddress=$ipAddress

To release:

        
powershell
        

            
        
     
netsh interface portproxy delete v4tov4 listenport=3000 listenaddress=0.0.0.0

To show all currently configured:

        
powershell
        

            
        
     
netsh interface portproxy show all

Ubuntu failing to start, even after reinstall, with:

        
bash
        

            
        
     
Error: 0x80040326
Error code: WSL/Service/0x80040326
Press any key to continue...

[process exited with code 4294967295 (0xffffffff)]

Run the following, and then restart:

        
powershell
        

            
        
     
wsl --update

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