Swap not enabled. How to diagnose and enable?

[Stux]

Maybe this?

TrueNAS Scale for SoHo usecases

Found the issue with my setup /dev/md127 isn’t the valid device. I need to use /dev/mapper/md127. # swapon -d=once /dev/mapper/md127 # cat /proc/swaps Filename Type Size Used Priority /dev/dm-0 partition 8379388 0 -2