The Db2 Portal Blog

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

Thursday, May 21, 2026

Concurrency vs. Throughput in Db2

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As Db2 DBAs we often find ourselves chasing two elusive targets: speed and capacity. We want our systems to handle everything all at once, a...
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 29, 2026

A SQL review workflow

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It is important to review SQL statements during testing... certainly before they get to production! A good SQL review workflow shouldn’t fee...
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...
Tuesday, March 31, 2026

The Quiet Erosion of Db2 for z/OS Expertise

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There’s a shift happening in Db2 for z/OS environments that isn’t getting nearly enough attention. It’s not a new feature. It’s not a new re...
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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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