Increase available ram for ZFS on Truenas scale

To check the amount of memory that is allocated

cat /sys/module/zfs/paramaters/zfs_arc_max

To modify the amount of memory in use (in bytes, 15gb) Change after echo to the required amount of bytes.

Bytes Calculater

echo 16106127360 >> /sys/module/zfs/parameters/zfs_arc_max