by Robert | Jan 20, 2023 | Uncategorized
A recent conversation I had with some folks who support a large Db2 for z/OS system reminded me of the importance of something called "wait for other read time." In this blog entry I want to make clear to people what Db2 wait-for-other-read time is, why it's...
by Robert | Dec 21, 2022 | Uncategorized
Db2 13 for z/OS, which became generally available about seven months ago, introduced two interesting features that are similar in some ways but differ in one important aspect (about which I'll comment momentarily). These new features allow an application (or, more...
by Robert | Nov 11, 2022 | Uncategorized
I had an interesting exchange recently with a Db2 for z/OS systems programmer. This individual had been asked to assist in determining the cause of a performance problem impacting a Db2-accessing application. The sysprog shared with me a Db2 monitor-generated...
by Robert | Oct 28, 2022 | Uncategorized
It could be said that preparation for migration of a Db2 12 for z/OS system to Db2 13 comes down to one thing: activate Db2 12 function level 510. That's a pretty simple-looking migration plan, but there's more to it than meets the eye - as I'll explain in this blog...
by Robert | Sep 28, 2022 | Uncategorized
About 15 years ago, I posted to the blog I maintained while working as an independent consultant (prior to rejoining IBM in 2010) an entry in which I named GETPAGEs the most important factor with regard to the CPU consumption of a Db2 for z/OS application...
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