Alternative One: To study AIX performance you can use the standard UNIX tools or AIX additional tools to investigate the system but there are many tools, each has different options and none are user friendly. If you insist then read our sumary of the tools - AIX performance tools
Alternative Two: To study AIX performance you can use the excellent tool called Performance Toolkit/6000 (also known are PTX or xmperf). This gives a X-Windows graphical view of the performance of an AIX system. Unfortuately, its optional and costs money, so you do not find it every where. Once setup, it is very good but nmon shows more information and on a dumb screen. PTX does (because of the graphs) show the history of the statistics and can show trend that nmon cannot. The PTX configuration file can take time to set up so use this as a good starting point xmperf.cf
