Preparing for Any z/OS Performance Analysis ..... January 20th ..... Sign up using this link

Are you new to performance analysis? Or maybe your manager has tasked you with a performance analysis assignment. Or maybe you just want to make sure you are prepared for any performance problem that comes you way. This presentation might not discuss how to do one specific performance analysis. Instead, during this presentation, Peter Enrico will discuss some very basic tasks you need to do to prepare for any performance analysis that may come your way.

Evaluating Coupling Facility Lock Structures ..... February 3rd ..... Sign up using this link

Typically, the Coupling Facility lock structures are the most expensive structures in your data sharing environment. In this context, expensive means that lock structure operations typically consume more MSUs on your z/OS images than other types of structures. During this presentation, Peter Enrico will discuss coupling facility lock structures and lock structure performance, so you have the insights you need to help improve performance and reduce MSUs.

Exploring Coupling Facility Exploitation by VSAM RLS ..... February 17th ..... Sign up using this link

VSAM RLS has been around for a number of years, but evaluation of VSAM RLS performance is an analysis that must regularly be conducted. This back-to-basics presentation will explore Peter Enrico’s understanding of the coupling facility exploitation by VSAM RLS.

Data in Memory (DIM) Primer ..... March 3rd ..... Sign up using this link

Yes… I/O is much faster and cheaper these days but having data in local buffers will still usually provide the best performance. During this back-to-basics presentation, Peter Enrico will give a refresher of certain Data In Memory (DIM) techniques.

Counting Instructions: Valuable Insights or More Noise? ..... March 24th ..... Sign up using this link

Several years ago, IBM added an option to record instruction counts in the SMF 30 data. They almost immediately realized that the instruction counts were skewed by I/O interrupts and so the recommendation was to not use them. More recently, IBM has started to say that maybe you can derive useful information from the instruction counts if you just discard the bad measurements. Does this make sense? Are there insights to be gleaned from those instruction counts? Can you use them to find inefficiencies? Or does the natural variability introduce too much noise to make sense of any signal that may be lurking in the data? In this session, we will explore what we have discovered by looking through data from multiple customers that have enabled the instruction counters in the SMF 30 data.

Previous Sessions

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