Nancy -

Confer with your AIX people on identifying processes using the most
memory in your server system, where 'ps' and various other monitoring
facilities can report what's using what.

In TSM, you can use the SHow MEMory command to report a summary of
memory usage and the SHow ALLOC command to report by module.  SHow
THReads will report what threads are in play.

Also, note that you are running base level TSM code, with no
maintenance, which is not a good idea.

   Richard Sims