ARC would be perfectly happy with small amounts of memory. ZFS ' ARC implementation will free memory as required by the system (provided that the Linux kernel a

ARC would be perfectly happy with small amounts of memory. ZFS ' ARC implementation will free memory as required by the system (provided that the Linux kernel asks) and grow when memory is not in use up to zfs_arc_max. The limit is completely configurable and can be set to something small like 64MB.