WSL2 tricks

How to Set Memory and CPU Limits in WSL 2

Follow these steps :

1. Create or Edit the .wslconfig File

1. Create or update the file : C:\Users\MyUsername\.wslconfig
2. Add the following configuration :

   [wsl2]
   memory=4GB          # Set the maximum memory to 4 GB
   processors=2         # Limit the number of processors to 2
   swap=1GB             # Optional: Set the swap file size to 1 GB
   localhostForwarding=true  # Optional: Enable localhost forwarding
       

2. Restart WSL

To apply the changes, restart WSL:

1. Open PowerShell or Command Prompt.
2. Run the following command to shut down WSL:

   wsl --shutdown

3. Start WSL again by launching your distribution (e.g., Ubuntu).

3. Verify the Changes

After restarting, verify the new settings:

• Check Memory: Run the following command in your WSL terminal:

  free -h

  This shows the total, used, and available memory.
• Check CPU: Run the following command:

  nproc

  This displays the number of processors available to WSL.

Enable systemd and prevent any modification on the /etc/resolv.conf to prevent any internet problem access:

2 steps:
– Edit /etc/wsl.conf with:

[boot]
systemd=true
[network]
generateResolvConf = false

– hardcode the content of /etc/resolv.conf:
sudo rm /etc/resolv.conf
sudo bash -c 'echo "nameserver 1.1.1.1" > /etc/resolv.conf'

You can restart WSL now:
wsl --shutdown