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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452 OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
Figure 13-26 Index advisor
13.6 Using Performance Trace to find object locks
There are many incidences that slow query performance is not caused by insufficient system
resources nor unoptimized SQL statements, but rather due to object locks. With this in mind,
we discuss using Performance Trace to find object locks in this section.
This OS/400 facility uses trace data to provide information about locks during system
operation. With this information you can determine if jobs are being delayed during
processing because of unsatisfied lock requests. These conditions are also ...
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