As a DBA you are rather frequently asked whether the database is the same structure-wise all over the different environments. Whenever a decent release management is in place you can be very relaxed answer that this is the fact. This article will explain how to compare based on SQL.
In the early days of DB2 for z/OS, pretty much every change to a table would result in an unload-drop-recreate-load of the table. This article will talk about how the ALTER table in DB2 12 for z/OS has evolved from DB2 11 for z/OS and what you need to know from a practical point of view.
This article starts a serial devoted to Db2 for z/OS System Profiles. Profiles are still not widely used and known while they represent a strong capability allowing to automatically tune the system. This introductory article discusses how you can define and activate a system profile.
Investigating performance problems doesn’t have to be hard. There are some basic steps you can take to find common bottlenecks in your system – ‘performance first aid’ if you will. We’re going to look at some of these basic problems and how to find them, using monreport.dbsummary & friends.