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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462 OnDemand SQL Performance Analysis Simplified on DB2 for i5/OS in V5R4
If a high priority job (low number) is using a lot of CPU, greater than 50% for an extended
period of time, then the job can cause the entire system to have poor response times. If it
is found that one or a few jobs are using the majority of CPU, then ask:
– Is the priority of the job really appropriate?
– Is the job running in the correct environment? For example, if the job is interactive,
would it be better suited to run in batch?
– What is the job doing?
If the CPU utilization is high, greater than 80%, and all jobs seem to have an equal but
small CPU percent, this ...
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