The live mode feature requires more disk space than the classical upgrade with custom initramfs because of the squashfs image that needs to be stored on disk. These requirements are somewhat communicated, however, they are based on loose guess on how much disk space is required.

Moreover, the squashfs image is unnecessarily large since it contains leapp's entire DNF cache.

Therefore, it is necessary to:

1. Make squashfs smaller by temporarily moving the <targetuserspace>/var/cache/dnf somewhere else, creating the image, and then moving the cache back where it is supposed to be.
2. Document more precise disk space requirements for the squashfs image based on point 1. This information needs to be included also in user-facing report about livemode being enabled.
3. Measure memory use of the system post boot, before the leapp enters starts running and estimate whether there is a significant overhead caused by squashfs image decompression.