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 177
The presence of optimization records indicates a full open for an Open, Select into, Update,
Delete, or Insert operation. Optimization records are immediately followed by SQL summary
records (QQRID=1000) for that operation.
Subsequent occurrences of this query within the same job either run in reusable ODP or
nonreusable ODP mode. Nonreusable mode is indicated by the presence of optimization
records each time a particular query is run (full open). Reusable ODP mode is indicated by
3010 and 1000 records each time the given query is run (no optimization records or full
open).
Linking query instances in the Database Monitor data
The data in the Database Monitor file is arranged chronologically. This ...
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