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Automated Physical Database Design and Tuning
book

Automated Physical Database Design and Tuning

by Nicolas Bruno
February 2011
Intermediate to advanced content levelIntermediate to advanced
253 pages
8h 4m
English
CRC Press
Content preview from Automated Physical Database Design and Tuning
Chapter 5
Designing a Cost Model
As we discussed in previous chapters, physical database design can be seen as
a complex search problem over a potentially very large space of feasible con-
figurations. Although there are different approaches to conducting this search
(we discuss different alternatives in Chapter 6), a common requirement of any
solution is the ability to evaluate the expected cost of a query under a given
candidate configuration in the search space. In Section 3.2.2 we discussed why
early designs, which were based on a cost model outside of the query opti-
mizer, cannot be trusted and in general produce undesirable results. At the
same time, ...
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Publisher Resources

ISBN: 9781439815670