tuning(7) begins:
"The swap partition should typically be approximately 2x the size of main memory for systems with less than 4GB of RAM, or approximately equal to the size of main memory if you have more. "
I can't believe that 64 GB swap should be a norm for a system with 64 GB RAM.
<https://man.freebsd.org/cgi/man.cgi?query=tuning&sektion=7&manpath=freebsd-current>