August 2012
Intermediate to advanced
452 pages
15h 41m
English
book
Optimizing DB2 Queries with IBM DB2 Analytics Accelerator for z/OS
by Paolo Bruni, Patric Becker, Willie Favero, Ravikumar Kalyanasundaram, Andrew Keenan, Steffen Knoll, Nin Lei, Cristian Molaro, P S Prem
Content preview from Optimizing DB2 Queries with IBM DB2 Analytics Accelerator for z/OS
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222 Optimizing DB2 Queries with IBM DB2 Analytics Accelerator for z/OS
10.1 Query acceleration criteria
In general, eligible queries for DB2 Analytics Accelerator are mostly long-running OLAP
queries. Short-running OLTP queries will seldom qualify.
This section discusses other basic acceleration criteria that are currently being used by the
DB2 optimizer to make a decision about whether or not to accelerate a given query. The
criteria described in this section is valid at the time of writing and might change in the future.
Figure 10-1 shows the acceleration criteria without any consideration to the sequence of
evaluation.
Figure 10-1 DB2 Analytics ...
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