PROCEEDINGS OF THE THIRD ANNUAL SIGCOSIM SYMPOSIUM I N T R O D U C T O R Y REMARKS TO SESSION ON "SYSTEM P E R F O R M A N C E M E A S U R E M E N T " M i l t o n Hess, Chairman The field of p e r f o r m a n c e m e a s u r e m e n t is b e c o m i n g an u n d e r s t o o d p l a n n e d activity now in third g e n e r a t i o n computer facilities, Once upon a time, I guess, way back in the b e g i n n i n g you m i g h t have said that the goal of p e r f o r m a n c e m e a s u r e m e n t was to accumulate information, to measure as many things as you could about your system. It was a little bit like the story S a m Robinson tells about his father d r a g g i n g the six kids through the m u s e u m and they were going along hand-in-hand. They were going so slowly and he was getting so frustrated and finally he just stopped and b e l l o w e d out at them, "If you are going to stop and look at everything, you're not going to see anything." This is the way it was in computer measurement. You really didn't see anything b e c a u s e you were just looking at all the data. N o w we know w h a t to measure. E x p e r i e n c e taught us w h a t were the important q u a n t i t i e s to make a computer system run right. But m e a s u r i n g these quantities is really only a means to an end, it is not the goal itself. I consider the goal to be p r o c e s s i n g the w o r k load. Getting the user's programs running b e t t e r on your facility. That is the goal and the measurement data should be used not just to record statistics about how you are doing, but it should be used as input to m a k i n g a s y s t e m run better in the e n v i r o n m e n t of the w o r k load. The papers today reflect a growing awareness that you can't undertake systems improvement, p e r f o r m a n c e improvement, without c o n s i d e r i n g the workload, w i t h o u t looking at the way the users are m i s h a n d l i n g your system.
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Introductory remarks to session on system performance measurement
Hess, Milton
Follow ACM SIGCSIM Installation Management Review
, Volume 2 (si1)
Association for Computing Machinery – Oct 1, 1972
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