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Mainframe, Performance, Topics Podcast
Marna Walle
37 episodes
5 days ago
Martin Packer (Principal z Systems Investigator) and Marna Walle (z/OS Development) are two IBMers talking about whatever z/OS topics come to mind.  Often guest experts weigh in on current technologies.  This podcast will give you timely, interesting, and entertaining z/OS topics.  Each episode comprises a “Mainframe” item, a “Performance” item, and “Topics” which is anything Martin or Marna care to talk about, which might or might not be related to their jobs.  So it goes… 
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Martin Packer (Principal z Systems Investigator) and Marna Walle (z/OS Development) are two IBMers talking about whatever z/OS topics come to mind.  Often guest experts weigh in on current technologies.  This podcast will give you timely, interesting, and entertaining z/OS topics.  Each episode comprises a “Mainframe” item, a “Performance” item, and “Topics” which is anything Martin or Marna care to talk about, which might or might not be related to their jobs.  So it goes… 
Show more...
Technology
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Episode 35 "In search of EXCELence?"
Mainframe, Performance, Topics Podcast
47 minutes 49 seconds
1 year ago
Episode 35 "In search of EXCELence?"

What’s New

  • z/OS dependencies moved from Semeru 11 to 17 before November 2025
  • Manual of the Moment: MVS Extended Addressability Guide for learning about address spaces, data spaces, and hiperspaces.

Mainframe - Looking at ages of fixes you haven't installed yet

  • IBM has started adding a REWORK date to PTFs. The date may be a day or two before the actual availability date.
  • Use case example: requirement with a policy that Security/Integrity (SECINT) PTFs that meet some criteria must be installed within xx days of availability.
  • Fits nicely with the z/OS UUID support, from Episode 34.

Performance - Drawers, Of Course

  • Martin explores the IBM z16 drawers, frames, and cache hierarchy.
  • All of an LPAR’s logical processors and memory should be in the same drawer.
  • Important because cross-drawer memory and cache accesses are expensive.

Topics - Excel Love It Or Hate It

  • Martin and Marna discuss how they use Excel, and what they like and dislike about it.
  • Graphing and customization difficulties were investigated.

On the blog

  • Marna's blog
  • Martin's blogs

So It Goes...

Mainframe, Performance, Topics Podcast
Martin Packer (Principal z Systems Investigator) and Marna Walle (z/OS Development) are two IBMers talking about whatever z/OS topics come to mind.  Often guest experts weigh in on current technologies.  This podcast will give you timely, interesting, and entertaining z/OS topics.  Each episode comprises a “Mainframe” item, a “Performance” item, and “Topics” which is anything Martin or Marna care to talk about, which might or might not be related to their jobs.  So it goes…