I know many of us are prone to think of AIX systems as "self tuning" - and while this is true for the kernel, there are lots of other places we can make a big difference.
For anyone interested in looking at performance on AIX systems, I have found an article by the guy who wrote nmon:
http://www-941.ibm.com/collaboration/wiki/...+and+TechniquesAlso they include these shell scripts for the different versions of AIX that can be run and they collect data.
ftp://ftp.software.ibm.com/aix/tools/perftools/perfpmr/SCHWEET!!!!!