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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398 OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
Setting the parallel degree allows the query optimizer to consider the use of SMP. The
optimizer determines whether or not the query will benefit from parallel methods, and builds
the appropriate strategy for using database parallelism.
11.4.5 Enabling parallel processing
After you install the DB2 SMP feature, there are several different ways to activate parallel
processing so that parallel index builds and maintenance can be performed.
At a system level
By default, the amount of parallel processing is controlled at a system-wide level via the
QQRYDEGREE system value. If ...
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