RAM needed ZFS and TrueNAS

Hey guys, I’m preparing a video to demystify things around TrueNAS and ZFS, but one of the things I’m having a hard time figuring out is the TRUE minimum memory, more specifically for the system to work (even if it won’t be a performant machine) or that ZFS requires to actually function.

Looking at TrueNAS docs, they suggest around 8GB of RAM TrueNAS Hardware Guide | TrueNAS Documentation Hub

Looking at ZFS docs, they say at least 8GB for best performance, but it’s possible to run it with 2GB or less FAQ — OpenZFS documentation (I know this is not the whole TrueNAS system, of course).

How do you guys see it?

As the docs say…

8GB for TrueNAS… which includes a whole OS + other software & ZFS
2GB for ZFS