Comment 2 for bug 1847785

As seen on the duplicate bug 1847848, 2 GB can trigger the installers' OOM killer. With 3 GB, installation (with ZFS) succeeded for me (but 3 GB is probably still too little for a ZFS Desktop system, so I agree more is much better there).

Maybe the easiest way to fix this for the 19.10 release is to just add a textual note next to the ZFS installer option.