One Service Definition To Rule Them All?

This is one of those posts where I have to be careful about what I say – to not throw a customer under the bus with over-specificity. So, bear with me on that score. Actually it’s two customers, not one. But they have the same challenge: Managing Workload Manager (WLM) service definitions for multiple sysplexes.Continue reading “One Service Definition To Rule Them All?”

Mainframe Performance Topics Podcast Episode 29 “Hello Trello”

This was a fun episode to make, not least because it featured as a guest Miroslava Barahona Rossi. She’s one of my mentees from Brasil and she’s very good. We made it over a period of a few weeks, fitting around unusually busy “day job” schedules for Marna and I. And this one is oneContinue reading “Mainframe Performance Topics Podcast Episode 29 “Hello Trello””

Mainframe Performance Topics Podcast Episode 28 “The Preview That We Do Anew”

(Originally posted 2 March, 2021.) It’s unusual for us to publish a podcast episode with a specific deadline in mind. But we thought the z/OS 2.5 Preview announcement was something we could contribute to. So, here we are. I also wanted to talk about some Open Source projects I’ve been contributing to. So that’s inContinue reading “Mainframe Performance Topics Podcast Episode 28 “The Preview That We Do Anew””

SMF 70-1 – Where Some More Of The Wild Things Are

(First posted February 21, 2021) As I recall, the last time I wrote about SMF 70-1 records in detail was Engineering – Part Two – Non-Integer Weights Are A Thing. Even if it weren’t, no matter – as I’d like you to take a look at it. The reason is to reacquaint you with ERBSCANContinue reading “SMF 70-1 – Where Some More Of The Wild Things Are”

Coupling Facility Structure Performance – A Multi-System View

It’s been quite a while since I last wrote about Coupling Facility performance. Indeed it’s a long time since I presented on it – so I might have to update my Parallel Sysplex Performance presentation soon. (For reference, that last post on CF Performance was Maskerade in early 2018.) In the past I’ve talked aboutContinue reading “Coupling Facility Structure Performance – A Multi-System View”

SAP And Db2 Correlation IDs

Every so often I get to work with a SAP customer. I’m pleased to say I’ve worked with four in recent years. I work with them sufficiently infrequently that my DDF SMF 101 Analysis code has evolved somewhat in the meantime. The customer situation I’m working with now is a good case in point. AndContinue reading “SAP And Db2 Correlation IDs”

Mainframe Performance Topics Podcast Episode 26 “Sounding Board”

In Episode 25 I said it had been a long time since we had recorded anything. That was true for Episode 25, but it certainly wasn’t true for Episode 26. What is true is that it’s taken us a long time from start to finish on this episode, and ever so much has happened alongContinue reading “Mainframe Performance Topics Podcast Episode 26 “Sounding Board””

Mainframe Performance Topics Podcast Episode 25 “Flit For Purpose”

It’s been a long time since Marna and I recorded anything. So long in fact that I’d forgotten how to use my favoured audio editor Ferrite on iOS. But it soon came back to me. Indeed the app has moved on somewhat since I last used it – in a number of good ways. So,Continue reading “Mainframe Performance Topics Podcast Episode 25 “Flit For Purpose””