cpustat and cputrack commands

Monitors performance of a system or a process using CPU performance counters.

cpustat(1M) and cputrack(1)

netstat and nfsstat commands

Displays information about network performance.

netstat(1M) and nfsstat(1M)

ps and prstat commands

Displays information about active processes.

sar and sadc commands

Collects and reports on system activity data.

swap command

Displays information about available swap space on your system.

vmstat and iostat commands

Summarizes system activity data, such as virtual memory statistics, disk usage, and CPU activity.

kstat and mpstat commands

Examines the available kernel statistics, or kstats, on the system and reports those statistics which match the criteria specified on the command line. The mpstat command reports processor statistics in tabular form.

kstat(1M) and mpstat(1M) man pages.