The Db2 Portal Blog

News, views, and items of interest on IBM's Db2 database management system and mainframes.

Showing posts with label performance. Show all posts
Showing posts with label performance. Show all posts
Thursday, July 02, 2026

The Most Overlooked Db2 Performance Metric

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  If I had to identify a single most overlooked Db2 performance metric, it would be GETPAGEs . Many organizations focus on CPU utilization, ...
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Tuesday, June 23, 2026

Db2 for z/OS Lock Escalation: When Fine-Grained Locking Becomes a Problem

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One of the primary goals of Db2 for z/OS locking is to maximize concurrency while maintaining data integrity. In a perfect world, every appl...
Thursday, May 14, 2026

The Mullins 5‑Step Performance Diagnosis Framework

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In the complex ecosystem of enterprise mainframes and hybrid cloud environments, performance tuning often feels like chasing ghosts in the m...
Wednesday, April 08, 2026

A High-Level Guide for Db2 Database Health Checks

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 Here’s a practical, field-tested 10-point Db2 database health check you can use to quickly assess the state of your environment and identi...
Wednesday, March 25, 2026

The Silent Performance Killers in Db2 for z/OS: What You’re Probably Not Monitoring

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 If you’ve been working with Db2 for z/OS long enough, you’ve likely experienced this scenario. Everything looks fine. CPU is within expect...
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About Me

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Craig S. Mullins
Sugar Land, Texas, United States
Craig S. Mullins is a data management strategist, researcher, and consultant. He is president and principal consultant of Mullins Consulting, Inc. and the publisher/editor for The Database Site.

Craig has been named by IBM as a Gold Consultant and an IBM Champion for Analytics. He has been named as one of the Top 200 Thought Leaders in Big Data and Analytics by AnalyticsWeek magazine.

Craig has over three decades of experience in all facets of database systems development and has worked with Db2 since V1. You may know Craig from his popular books: Db2 Developer's Guide (covering IBM's mainframe RDBMS)... A Guide to Db2 Performance for Application Developers (how to write efficient Db2 programs) and... Database Administration: The Complete Guide to DBA Practices and Procedures (a guide to heterogenous DBA).
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