The answer is:
RTFM on pstat
The two that look the most promising are:
pstat -s
pstat -T
sjserver{root}10: pstat -T
466/1017 files
228/554 inodes
120/266 processes
28424/194896 swap
sjserver{root}11: pstat -s
17240k allocated + 10992k reserved = 28232k used, 166664k available
sjserver{root}12:
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:12:49 CDT