Mainframe, Performance, Topics

A very slow train coming, due to Marna’s and my commitments.

Increasingly customers are using 1MB and 2GB page frames.

Wouldn’t you like to know where in the machine an LPAR’s memory is?

Or “An Indecent Interval”?

It’s possible I’ve written about this before.

It is rare to need to evacuate hardware.

When assessing how well a WLM policy protects key work it’s necessary to understand how much CPU is used at each importance level. \ If there is very little work at a lower importance (higher importance number) a CPU crunch will leave work at this importa…

In Engineering – Part 8 – Remote Access Detection I talked about reasons why LPARs might go cross-drawer.

They were simpler times back then.

Modern Machines, Modern Metrics In z17 Sustainability Metrics – Part 0 I wrote about the new z17 Sustainability Metrics, or “Power Consumption”, if you prefer.

If the purpose of Version 5 was to add the ability to use Python in the context of md2pptx the purpose of version 6 is to extend md2pptx’s automation capabilities still further.

A while back I experimented with executing user-provided Python.

I wondered a while back why I hadn’t got mdpre to 1.0.

A long time ago I wrote blog posts about driving Unix System Services from REXX.

I’ve had a task on my to-do list for some time now to assess the state of my blog and publish some posts I knew I had drafted.

I call this “Part 0” because I haven’t yet seen any data.

We were especially keen to get a podcast episode out on the day z17 was announced, having both worked on the launch project in various capacities.

As usual it’s taken us longer than we would like.

It seems to me understanding when an installation’s utilities run is important.

I’ve tended to think Affinity Nodes aren’t worthy of study – because there’s little you can do to influence them.

The fact we’re up to “Part 8” illustrates there’s a lot to talk about once you take performance analysis down to the individual logical / physical processor level.

I was recently asked where I was getting the home addresses for logical processors from in RMF SMF 70.

Just a short post to add another AppleScript snippet some might find useful.

In Excel – Sorted With AppleScript I mentioned I might have a go at transposing rows and columns in an Excel spreadsheet with AppleScript.

They say necessity is the mother of invention.

In Automating Microsoft Excel I wrote about some basic manipulation of graphs in Excel for Mac OS, using AppleScript.

In Drawers And More I mentioned Parking with the words One day I’ll be able to colour VL’s according to whether they are parked or not – or rather fractions of the interval they’re parked.

Late last year I wrote a blog post: Drawers, Of Course.

This post is about processor drawers and how the topic might influence your LPAR design.

We started planning this one quite a while ago.

(This is not a post about plumbing.)

In Bursty Batch I talked about how some customers have large amounts of batch work coming in all at once, and how a new WLM function in z/OS 3.1 might be handy in catering for it.

This post is about Coupling Facility sizing – particularly when you don’t have one to start with.

Bursty batch is quite common.

I suppose I’d better tell you what an E15 exit is – else you might not read the rest of the post.

It was recently brought to my attention that CFLEVEL 25, made available with IBM z16, improved ICA-SR links.

I hope you can tell that Marna and I had a lot of fun making this episode.

I’m writing this on a flight to Munich, where I’m presenting Parallel Sysplex Resiliency at a customer conference.

This post is about whether to run coupling facility (CF) LPARs using general purpose processors (GCPs).

Three recent events led to this blog post: I was driving a while back and listening to podcasts.

Episode 32 was, as always a slow train coming.

They say beauty is in the eye of the beholder.

I was about to comment it’s been a while since I wrote about WLM but, in researching for this post, I discover it isn’t.

I loftily talk about “architecture” a lot.

When I see an 8-byte field in a record I think of three possibilities, but I’m prepared to discover the field in question is none of them.

This is the first blog post I’ve written on my new work MacBook Pro.

One item in the z/OS 2.5 announcement caught my eye.

I’ve written several times about System Recovery Boost (SRB) so I’ll try to make this one a quick one.

For quite a while now I’ve been able to do useful CPU analysis down at the individual logical processor level.

It’s been a mighty long time since Marna and I got a podcast episode out – and actually we started planning this episode long ago.