Guardian Performance Analyzer (GPA) User Guide

Guardian Performance Analyzer (GPA) User Guide – (544541-006) Page 76 of 131

Section 4: Using GPA Information

Interpreting the Standard Report

A GPA analysis can detect and point to a number of causes of poor or inefficient system

performance. For some of the problems, such as a memory shortage or a load

imbalance, GPA can make appropriate tuning recommendations and even, in some

cases, provide the means for automatically implementing the recommendations. For

other performance issues, such as transient processing, GPA can reveal the condition,

but the user must decide how to correct it. (For a general discussion of system tuning,

see Section 4 in the Measure User’s Guide.)

This subsection discusses the various sections of the GPA Standard Report described in

Section 3: Description of GPA Reports. In the discussion, we look at three GPA

analysis examples. One is for a node (\NODEA) in which the main problem is a serious

shortage of memory, one is for a node (\NODEB) that exhibits a CPU load imbalance,

and one is for a node (\NODEC) that requires a change in the configuration of its

primary disk processes.

With regard to these examples, keep in mind that GPA considers a shortage of memory to

be the most serious problem on a node. If the shortage is severe enough, as is the

case for \NODEA, GPA deals initially only with this issue even though the analysis may

find other tuning problems on the node. Once the memory shortage problem is

corrected, another GPA analysis would consider and make tuning recommendations

for the remaining problems.

System Performance Summary

The System Performance Summary gives you an overall picture of the system and

indicates, in general, how well or how poorly the system analyzed is performing. From

this section of the report, you can do the following:

 Become familiar with the system‟s characteristics.

 Assess the general health of the system.

 Spot quickly where any problems may lie.

 Determine the potential for improved system performance.

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