Performance tuning

I know that there are volumes written on the ins and outs of performance
tuning but I wonder if there is a "quick start" reference that you can
recommend to me so I can perhaps solve a problem quickly.

I have a large I/O intensive application (RPG400) that is called as a stored
procedure through an ODBC connection and the QSERVER subsystem ends up
bogging down the interactive applications when this thing runs.  I am going
to walk through the code again to see if I can optimize the RPG but I wonder
if there is a way to control the amount of CPU the job (a QZDASOINIT job)
can use?  I would assume that it is either something I can set at the
subsystem level or perhaps I can change the job description of the startup
of QZDASOINIT?

Any helpful pointers, short of rocket science, would be appreciated.

Pete Helgren
Timpanogos Technologies, Inc
801.892.9106 x 202