Thanks for the response. Does that mean that the available space here includes part of the Used space that can be reclaimed when required (without including the swap usage)?
I'm seeing the following data on running the free -h command:
$ free -h
total used free shared buff/cache available
Mem: 46G 39G 495M 67M 7.3G 23G
Swap: 15G 524M 15G
How is this...