The SPARC SuperCluster T4-4 compute node CPU and memory resources are initially allocated during installation and defined by your configuration. To change how those resources are allocated, use the CPU/Memory tool (setcoremem).This tool enables you to change the CPU and memory allocation for the current domains only (you cannot modify the number of domains with this tool). Supported configurations for each domain must contain a minimum of 4 cores and 32 Gbytes of memory, and must be configured in multiples of 4 and 32 respectively.
You can allocate less than 32 cores and less than 1 TB of memory for a compute node. Any unused cores are considered parked cores and are not counted for licensing purposes. However, parked cores are unusable and essentially wasted. A better alternative in most situations is to assign cores to a different domain.
The CPU/Memory tool package ships on the system, but you must install the package to use it. For package installation instructions, see the “Installing a Package” section of the Adding and Updating Oracle Solaris 11.1 Software Packages document:
http://docs.oracle.com/cd/E26502_01/html/E28984/gihhp.html#gikvp