Several tools are available to examine system configuration. Some require root privilege, others can be run by a non-privileged user. Every structure and data item can be examined with the kernel debugger by using mdb on a running system or by booting under kadb..
The sysdef(1M) command provides the values of System V IPC settings, STREAMS tunables, process resource limits, and portions of the tune and v structures. For example, the sysdef "Tunable Parameters" section from on a 512 Mbyte UltraTM 80 system is:
10387456 maximum memory allowed in buffer cache (bufhwm) 7930 maximum number of processes (v.v_proc) 99 maximum global priority in sys class (MAXCLSYSPRI) 7925 maximum processes per user id (v.v_maxup) 30 auto update time limit in seconds (NAUTOUP) 25 page stealing low water mark (GPGSLO) 5 fsflush run rate (FSFLUSHR) 25 minimum resident memory for avoiding deadlock (MINARMEM) 25 minimum swapable memory for avoiding deadlock (MINASMEM)