True. However, the reason Mnesia is better suited for in-RAM data sets is that its disk-only storage engine, dets, requires a potentially long repair process if

True. However, the reason Mnesia is better suited for in-RAM data sets is that its disk-only storage engine, dets, requires a potentially long repair process if the VM crashes and a dets table isn't closed properly. This could keep your table inaccessible for a while after you restart the VM.