On Wednesday, 01/28/2009 at 11:27 EST, "Horlick, Michael" <michael.horl...@cgi.com> wrote: > I?m toying with creating a REXX EXEC which uses RXLDEV to create a logical 3270 > session and have the EXEC basically ?press? the ENTER key say every 30 seconds. > > I?m hoping this will mimic what a real interactive CMS user is experiencing. > Take the time before and the time after with a ?CP Q TIME? and see how long it > took.
Be sensitive to the fact that as the system begins to become unresponsive, so will your EXEC. I.e. its ability to press the ENTER key will be affected by a system slowdown. Having a guest on another system do the same thing by generating a DIAL VTAM and logging into your "system under test" will give you a better, more realistic perception of end-user response time. And, presumably, you're not interested in how long it takes to issue QUERY TIME, but in how long to do something meaningful to your interactive CMS users (i.e. what are THEY doing?). Gathering a body of data and correlating changes in end-user response time to the metrics gathered and reported by z/VM performance monitoring software would let you become self-monitoring rather than requiring a polling app. Alan Altmark z/VM Development IBM Endicott
