What happens when Workload Manager can anticipate batch demand instead of simply responding to it?
The latest issue of Cheryl Watson’s Tuning Letter leads off with findings from testing IBM AI-powered Workload Manager (WLM). The test used an AI model trained on 30 days of SMF 99.2 data. Results showed:
- Up to a 70% reduction in average job queue time for scheduled batch workloads
- Up to a 48% reduction in peak queued requests.
These results headline the newest edition of theTuning Letter, available exclusively to subscribers.
How AI Changes Batch Management
The piece, written by Yan Wang and Anastasiia Didkovska, examines how the capability works, how to train and activate it, and how to evaluate its potential benefits. It also covers simulation mode, which allows teams to review AI predictions before enabling them to influence WLM decisions.
Compared with traditional WLM management, AI-powered WLM:
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Reduced average job queue time from approximately 83 seconds to 25 seconds
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Lowered average peak queued requests from approximately 80 jobs to 42
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Started additional initiators roughly two minutes before scheduled demand arrived
The complete article provides technical details, performance metrics, and implementation guidance that subscribers need to assess the capability in their own environments.
What Is Cheryl Watson’s Tuning Letter?
For decades, Cheryl Watson’s Tuning Letter has helped mainframe professionals improve z/OS performance, reliability, and efficiency.
Each issue turns complex system behavior into practical guidance grounded in technical expertise, testing, and real-world experience. Subscribers gain detailed analysis they can apply to tuning decisions, system changes, and emerging IBM Z capabilities.
More in the Latest Issue
Along with the AI-powered WLM analysis, the September 2026 edition includes:
- The anatomy of an abend—and what a system dump can reveal
- Db2 Class 3 wait times and service task suspensions
- Lessons from a z17 migration and JES2 checkpoint reconfiguration
- A practical implementation guide for SMF Record Signing
- A closer look at the z17 single-frame and rack-mount systems
- The latest New Function APARs, conferences, and events
Subscribers can access the complete issue through the Tuning Letter website.
Not yet a subscriber? Check out subscription options for the latest issue and peruse the entire Tuning Letter archive.
Share Your Thoughts
We hope subscribers find the latest issue useful, practical, and thought-provoking – and that the curious nonsubscribers will consider signing up. We always welcome reader feedback.
All the best,
Mark
Editor, Cheryl Watson’s Tuning Letter
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