For Fedora 27 it says this:
Fedora Workstation to a laptop or desktop computer that has at least 1 GHz processor, 1 GB RAM, and 10 GB space available
https://getfedora.org/en/workstation/download/
When I set a VM to 1G it's always unusable. Sometimes it's PackageKit that crashes first, which causes systemd-coredump to spin up and run out of memory next, and then oom killers start killing off various processes. Sometimes the oom killing just starts happening without a prior crash. In any case I never get a desktop.
With 1.5G RAM I usually get a desktop but then if anything crashes, and it seems like PackageKit is crashing often when under memory pressure (?), it kicks off systemd-coredump which makes the memory problem worse, and a bunch of oom killers start killing off various processes. In any case, I cannot successfully run the installer or Firefox by themselves.
https://bugzilla.redhat.com/show_bug.cgi?id=1559176