The FSS must be the default scheduler on your system to have CPU shares assignment take effect.
Using a combination of the priocntl and dispadmin commands ensures that the FSS becomes the default scheduler immediately and also after reboot.
# dispadmin -d FSS
This change takes effect on the next reboot. After reboot, every process on the system runs in the FSS scheduling class.
# priocntl -s -c FSS -i all