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 399
The DEGREE parameter on the CHGQRYA CL command accepts the same values as the
system value. If the CHGQRYA command is executed in a job as shown in Example 11-7,
then the parallel degree is set to *MAX only for that job, regardless of the system value.
Example 11-7 Changing parallel degree only for a job
CHGQRYA DEGREE(*MAX)
This command can be issued multiple times within a job to turn parallelism on and off.
The QAQQINI file also lets you specify parallel processing for an individual job or connection.
The QAQQINI file can be used to influence the behavior of the database engine ...
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