Very good two commands to monitor CPU, Memory and Network on AIX:

netstat and vmstat

e.g. “netstat 5”, views the network activity, reports every 5 seconds, change 5 to 10 if you want every 10 seconds and so on.

e.g. “vmstat 5”, views the CPU and RAM activity, same as above.

Credit goes to my friend & colleague Emmanuel Simart for these two commands.