Mainframe modernization is often discussed in broad strategic terms, but for the teams responsible for keeping core systems running, the challenge is much more practical: How do you make change faster, safer, and more repeatable without disrupting critical...
Modernization can deliver tremendous business value. But cost savings only materialize when organizations understand how mainframe economics really work. Organizations often launch mainframe modernization initiatives with a clear objective: reduce costs by moving...
How monitoring and statistics data turn performance symptoms into evidence When something slows down in a CICS environment, the conversation often starts with a phrase every systems programmer (sysprog) has heard before: "CICS feels stuck." The problem with that...
IBM has an undocumented fix to the CICS WEB interface that can optimize throughput and response time while also saving CPU. This article explains how to make it work for you. In the course of my current project, I had the pleasure of working with Ole Olsen at JN Data...
The Latest Tuning Letter issue is out now! Subscribers to Cheryl Watson’s Tuning Letter will find the newest issue, 2026 No.1, on our Tuning Letter website. If you are not a current subscriber yet, sign up today! This subscription-only resource is available to both...
We are delighted to announce that Cheryl Watson's Tuning Letter 2025 No.2 is now available. If you haven't already subscribed, now is your chance to discover the most comprehensive body of practical and impartial z/OS, and MVS tuning and measurement advice ever...
