In my home case I have 32GB RAM and 3TB of the storage and my ZFS's settings are (4GB + 1GB of RAM for each 1TB of the storage):
root@pve:~# cat /etc/modprobe.d/zfs.conf
options zfs zfs_arc_min=4294967296
options zfs zfs_arc_max=8589934592
I also using following command in cronetab once a 24...