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 6. Custom Database Monitor Analysis 181
6.1.5 The 3001 Record: using an existing index
The 3001 record shows the index that will be used to access the table and why it was chosen.
If the index was chosen for a join operation, additional information is given to help determine
how the table “fits” in the join. The order of the 3001 records indicates the join order chosen
by the optimizer.
Index and table information
The following columns provide index and table information:
QVINAM and QVILIB: name of the chosen index and library
QVQTBL and QVQLIB: name of the associated table and library
Query optimization details
The following columns indicate ...
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