GPA Manual

Using GPA Information
Guardian Performance Analyzer (GPA) Manual—135081
4-30
The Detail System Performance Score Reports
corresponding tuning operations. SCFIN contains the SCF PRIMARY and SCF ALTER
DISK, CACHE commands required to perform the corresponding tuning operations.
If, after running PUPIN/SCFIN, you want to restore the system to its previous state, you
can do so by running PUP or SCF using PUPBAK or SCFBAK as the input file. After
implementing the GPA tuning recommendations, you should remeasure the system and
run another GPA analysis.
Beyond the GPA tuning recommendations, you can take these steps to deal with system
performance problems:
•
Check applications for possible bottlenecks.
•
Examine the data communications environment for sources of trouble.
•
Analyze the system hardware to determine if it provides an optimum configuration.
For system tuning, you need to keep in mind that GPA is meant to serve mainly as a
guide and to provide a quick and convenient performance analysis. For the best long-
term solutions to system performance problems, you need to have properly trained
personnel do a careful and detailed analysis.
The Detail System Performance Score Reports
The Detail System Performance Score Reports provide more detailed information about
how GPA rates the performance of a node and its subsystems, and how it derives the
final scores in the System Performance Score subsection of the System Performance
Summary. The Detail System Performance Score Reports consist of the following ten
subsections:
•
Negative Contributing Factors to CPU Score
•
Negative Contributing Factors to Memory Subsystem Score
•
Disk Cache Performance Score Grading
•
Negative Contributing Factors to Disk Volume Score
•
System Recovery Performance Score Grading
•
CPU Failure Simulation
•
Server Process Analysis for the Individual CPUs
•
Dynamic Server Process Analysis
•
Disk Cache Change Analysis
•
CPU Cache Change Analysis