Usually ssctuner is running. If for some reason ssctuner is not running, use this procedure to enable it.
# svcadm enable ssctuner
# svcs ssctuner
If the service does not transition to an online state after a minute or two, check the service log file. See View Log Files.
See View Log Files.
If configuration settings changed, you must reboot the OS for the changes to take effect. If settings did not change, you do not need to reboot the OS.