Note that, at this stage, WSL1 is installed and could be used with a distribution.Įnabling the Virtual Machine Platform to enable WSL2 consumed an additional 23,044,096 bytes. This is expected, since the feature is built in to Windows and is just 'enabled' (not necessarily installed). The initial size consumed by a WSL1 distribution will be greater than that of WSL2, however, WSL1 will release space back as files are deleted (unlike WSL2).Ī fresh install of Windows 11 + Updates, before WSL installation, consumed 35,584,876,544 bytes of disk space.Īfter enabling the WSL feature and rebooting, 35,587,739,648 bytes were consumed. I have not yet measured the Store/Preview version of WSL.Īlso, these measurements were taken with a WSL2 distribution. WSL is now available in Preview form from the Microsoft Store, and this version, when installed will consume more disk space since the features are not built into Windows. These measurements were done with the released version of WSL on Windows 11. An additional ~400MB are consumed by the installed rootfs tarball, which can be recovered.An Ubuntu distribution takes, at a minimum 1.1GB, but will quickly expand on first update/upgrade to around 2.7GB.The WSL feature and kernel take between 100-200MB of space.That said, here are some measurements done on Windows 11 today: It's also very difficult to measure the exact disk space utilized by any given Windows feature since Windows is constantly consuming and releasing disk space for other purposes as well. The answer(s) to this question will, of course, always be changing as WSL and its distributions are updated. Why is `du` on WSL acting giving a directory size greater than machine memory? What size does basic Bash/WSL subsystem on Windows occupy? I was not able to find how much room Bash on Ubuntu on Linux was occupying through Windows, but I was able to see how much it was using by running sudo ncdu / -exclude /mnt.

Ncdu reports 1.7 GiB (~1.82GB) which is pretty close to what Windows reports. Under Windows' Apps & Features it lists Ubuntu as taking up 1.92 GB So we do not get all of Windows' directories along for the ride we'll need to exclude the /mnt directory.

Using a tool like ncdu can make determining disk usage easy with a nice cli interface to it as well.

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