By default, ssctuner is installed and running. If for some reason ssctuner is not installed, use this procedure to install it.
# pkg install ssctuner
Oracle Solaris 10 OS:
# pkginfo ORCLssctuner
Oracle Solaris 11 OS:
# pkg info 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.
When ssctuner changes configuration files, you must reboot the OS for those changes to take effect.