Vmmem Using Huge Memory in Windows 11? Here's What It Is and the 2-Minute Fix

You open Task Manager, and a process called Vmmem (or VmmemWSL) is sitting on 4, 7, sometimes 12 GB of RAM — and you can’t end it. Right-click → End Task does nothing.

First, the good news: it’s not malware. Vmmem is how Windows reports the combined memory and CPU used by its virtualization layer — WSL2 (Windows Subsystem for Linux), Docker Desktop, Hyper-V VMs, Windows Sandbox, and Android emulators all show up under this one name. If you’ve ever installed Docker or Ubuntu from the Microsoft Store, that’s your culprit — WSL2 keeps holding memory even after you close the Linux/Docker window.

The 2-minute fix: shut down WSL

1. Open PowerShell as Administrator (Win+X → Terminal (Admin))
2. Run:

   wsl --shutdown

3. Watch Task Manager — Vmmem’s memory drops to near zero within seconds.

This cleanly stops all running WSL2 distributions (and Docker Desktop’s backend). Don’t force-kill Vmmem instead — you can lose unsaved work inside any running container, VM, or Linux session. wsl --shutdown is the safe version of the same thing.

If Docker Desktop is set to start with Windows, Vmmem will return at next boot — which is why you also want the permanent fix.

The permanent fix: cap WSL2’s memory with .wslconfig

By default, WSL2 is allowed to grab a large share of your total RAM. You can cap it:

1. Open File Explorer and go to C:\Users\<your username>\
2. Create a file named exactly .wslconfig (no .txt extension — enable “File name extensions” in Explorer’s View menu to check)
3. Put this in it:

   [wsl2]
   memory=2GB
   processors=2
   swap=1GB

   Adjust to taste — memory=2GB is comfortable for light Docker use; give it 4GB if you compile inside WSL.
4. Save, then run wsl --shutdown once. The limits apply from the next WSL start.

This is Microsoft’s documented mechanism (global WSL2 settings live in %UserProfile%\.wslconfig) and it’s the reliable way to stop Docker/WSL from creeping past the RAM you intended to give it.

If you don’t use WSL or Docker at all

Something installed it along the way. You can remove the whole layer:

1. Settings → Apps → Optional features → More Windows features
2. Untick Windows Subsystem for Linux, Virtual Machine Platform, and Hyper-V (only the ones you don’t use)
3. Reboot

Vmmem disappears permanently because nothing virtualized is left to run. (Skip this if you use Docker, Windows Sandbox, or an Android emulator — they need Virtual Machine Platform.)

FAQ

Why can’t I end Vmmem in Task Manager? It’s not a normal process — it’s the host-side representation of a virtual machine. You stop it by stopping the VM (wsl --shutdown), not by killing the meter that measures it.

Is high Vmmem usage bad? Not inherently — Linux aggressively caches file data in RAM it’s been given. The .wslconfig cap keeps that appetite inside a budget so the rest of Windows stays snappy.

Vmmem vs VmmemWSL? Same idea; newer Windows builds split WSL’s usage out under the VmmemWSL name so you can tell it apart from Hyper-V VMs.

Sources: Microsoft Q&A — VmmemWSL using 7GB when Ubuntu closed, WindowsReport — vmmem Windows 11