echo 3 > /proc/sys/vm/drop_caches (Bear in mind that 3 is the most aggressive but other than exporting the pool, it's the only way to dump the cache, especiall

echo 3 > /proc/sys/vm/drop_caches (Bear in mind that 3 is the most aggressive but other than exporting the pool, it's the only way to dump the cache, especially if you boot off ZFS)