Set ramdisk more space from RAM:
# add to /etc/system how much % in physical RAM can be use to ramdrive set ramdisk:rd_percent_physmem=99
Create ramdrive with name 'ramd':
ramdiskadm -a ramd 52G
Create zpool 'ramd' with new ramdrive:
zpool create ramd /dev/ramdisk/ramd