January 2005
Beginner to intermediate
928 pages
22h 14m
English
book
Understanding DB2®: Learning Visually with Examples
by Raul F. Chong, Clara Liu, Sylvia F. Qi, Dwaine R. Snow
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12.9. DB2 Maintenance Utilities
Performing maintenance activities on your databases is essential to ensure that they are optimized for performance and recoverability. In this section, we introduce a few utilities that you should use regularly to ensure the database is healthy and optimized.
12.9.1. The RUNSTATS Utility
DB2 utilizes a sophisticated cost-based optimizer to determine how data is being accessed. Its decisions are heavily influenced by statistical information about the size of the database tables and indexes. Therefore, it is important to keep the database statistics up to date so that an efficient data access plan can be chosen. The RUNSTATS utility updates statistics about the physical characteristics of a table and the associated ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.