Stream: Virtual Room 6
Time: 14:00 - 15:00
CPU overhead caused by the programming anti-pattern of updating data that’s too close to the instruction stream has long been a known problem. IBM came out with a nice formula that highlights time intervals where that may practice may be causing significant overhead. But that’s only part of the battle: the next question is how do you find the possible culprits so you can remediate them?
Join Scott Chapman in this session as he reviews what SIIS is, why it is a problem, and the IBM metric for finding the problem timeframes. He’ll then offer suggestions for finding candidates that may be causing the problem.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
• Scott Chapman joined EPS in 2014 as Director of Software Design and Development, Seminar Instructor and Performance expert. He has over two decades of experience in the IBM mainframe environment, with much of this experience focused on performance, from both the application and systems perspective • His mainframe responsibilities have included most facets of keeping a mainframe environment running effectively, from application development and performance tuning to software cost management and Sysplex and WLM configuration. • Scott was chosen as Computer Measurement Group's 2009 Mullen award winner, and also co-authored CMG's 2012 best paper. • Scott is a founding steering committee member of the Central Ohio Mainframe User's Group.
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