CPU Management ( psrinfo ) & ( prstat )

psrinfo  Command
To determine the number of processors in the system and their speed use the psrinfo -v command. In Solaris 10, -vp prints additional information.

prstar command

prstat  Command  (Determining User Consumption)

The CPU column of prstat always reports the percentage of system CPU resources a process is consuming and not the percentage of CPU resources of a processor or a processor set, even if the -C option is specified on the command line. For example, if there is a two-processor set on a four-processor system and a prstat -C is executed on the processor set, since the processor set has 50% of the system's CPUs, the total percentages of the CPU column will not exceed 50%.

To disable a processor the following command can be used:

psradm –f < processor number >
example: psradm –f 1

psradm –n < processor number >
example: psradm –n

Typical headers of the prstat command.

PID USERNAME SIZE RSS STATE PRI NICE TIME CPU-PROCESS/NLWP

PID – Process Id
USERNAME – Name of the user using the processor SIZE – Process Size
RSS - Resident Set Size ( Size of the process on the memory)
STATE – State of the process / Cpu information
PRI - Priority NICE – Nice value
TIME – Amount of time the process is running on the CPU
CPU PROCESS/NLWP – Command/Number of light weight processes / Threats
NPROC – Number of processes
USERNAME – Name of the User
MEMORY – Percentage of memory consumed.