Uncategorized – Page 6 – Mainframe, Performance, Topics

Third Time’s The Charm For SRB – Or Is it?

Passing reference to Blondes Have More Fun – Or Do They?. Yeah, I know, it’s a tortuous link. 🙂 And, nah, I never did own that album. 🙂 I first wrote about System Recovery Boost (SRB) and Recovery Process Boost (RPB) in SRB And SMF. Let me quote one passage from it: It should alsoContinue reading “Third Time’s The Charm For SRB – Or Is it?”

Stickiness

Question: What’s brown and sticky? Answer: A stick. 🙂 It’s not that kind of stickiness I’m talking about. I’ve experimented with lots of technologies over the years – hardware, software, and services. Some of them have stuck and many of them haven’t. I think it’s worth exploring what makes some technologies stick(y) and some notContinue reading “Stickiness”

Really Starting Something

This post is about gleaning start and stop information from SMF – which, to some extent, is not a conventional purpose. But why do we care about when IPLs happen? Likewise middleware starts and stops? Or any other starts and stops? I think, if you’ll pardon the pun, we should stop and think about this.Continue reading “Really Starting Something”

SRB And SMF

I’ve just had my first brush with SMF from z15’s System Recovery Boost (SRB). (Don’t blame me for the reuse of “SRB”.) 🙂 The point of this post is to share what I’ve discerned when processing this SMF data. System Recovery Boost To keep the explanation of what it is short, I’ll say there areContinue reading “SRB And SMF”

Clippy? Not THAT Clippy!

A recent episode of the Mac Power Users Podcast was a round up of clipboard managers – on iOS and Mac OS. You can find it here. There was a subsequent newsgroup discussion here which I’ve been participating in. There are lots of things I want from a clipboard manager. They include: It to keepContinue reading “Clippy? Not THAT Clippy!”

Anatomy Of A Great App

This post follows on from Anatomy Of A Great iOS App. That post was only written in 2019 but such a lot has changed in the Apple ecosystem that I think it worth revisiting. A hint at what’s changed is that the title of this post doesn’t contain the word “iOS” anymore. (I can’t insertContinue reading “Anatomy Of A Great App”

Instant Presentations?

For normal people making a presentation is as simple as opening PowerPoint and starting typing. But I’m not normal. 🙂 I would like to start with a mind map and end up with a presentation – with Markdown as my preferred intermediary. It doesn’t matter what the presentation is. Mine tend to be in oneContinue reading “Instant Presentations?”

What’s The Use?

It’s “Sun Up” on Conference Season – and I have a new presentation. It’s called “What’s The Use?” And it’s a collaboration with Scott Ballentine of z/OS Development. It’s very much a “field guy meets product developer” sort of thing. It emerged from a conversation on IBM’s internal Slack system. The idea is very simple:Continue reading “What’s The Use?”

Periodicity

When I examine Workload Manager for a customer a key aspect is goal setting. This has a number of aspects: How work gets classified – to which Service Class and Report Class by what rules. What the goals are for each Service Class Period. What the period boundaries should be. This post focuses on AspectContinue reading “Periodicity”

Four Coupling Facilities

This isn’t following on from Three Billboards? 🙂 but rather Shared Coupling Facility CPU And DYNDISP from 2016. I’m not sure it adds much that’s new but this set of customer data was an opportunity too good to miss… … It enables me to graph most of the Coupling Facility LPAR types you’re likely toContinue reading “Four Coupling Facilities”