November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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118 IBM ESS and IBM DB2 UDB Working Together
Figure A-10 Horizontal versus vertical (18 arrays) elapsed load times
Elapsed times for queries are shown in Figure A-11. Again, the layout has little impact on the
total elapsed query times.
Figure A-11 Horizontal versus vertical (18 arrays) elapsed query times
Extent and prefetch size tests
The following discussion presents a relevant question, and then offers our test design and
results.
Horizontal - 3 path fibre
Vertical - fibre - half
Horizontal - fibre - half
0 500 1000 1500 2000 2500
(seconds)
Elapsed time
Customer
Orders
LineItem
Supplier
Part Partsupp
Horizontal vs Vertical
load times
Horizontal - 3 path fibr ...
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