March 2007
Intermediate to advanced
488 pages
13h 46m
English
book
OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
by Hernando Bedoya, Jaime Gaug, James Kerl, Ser Ser NG, Jose Cardoso dos Santos
Content preview from OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
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Chapter 11. Environmental settings that affect SQL performance 389
this problem, programming interfaces were enhanced to give application developers greater
control of the cursor sensitivity setting.
The default setting of ASENSITIVE is the best performing option because it allows the query
optimizer to use its complete set of algorithms when deciding on the best method for
implementing a query. Utilization of an algorithm that makes a copy of the data (e.g., hashing)
can drastically improve performance and other queries where performance is better when
copies of the data are avoided. The ASENSITIVE setting gives the query optimizer the
freedom ...
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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.