GPA Manual

Using GPA Information
Guardian Performance Analyzer (GPA) Manual—135081
4-5
System Performance Summary
The global performance indicators (see Example 4-6) show that the Processor Load
Balance for \NODEC is an indicator that GPA rates as poor. At 88.93%, the Average
Cache Hit % could also be improved.
The Node Characteristics section and Global Performance Indicators can (in addition to
profiling the system’s health) point to the reasons for a system’s poor performance.
Disk Volume Subsystem Performance Score
You can get a further indication of where problems might lie from the Disk Volume
Performance subsection of the report (Example 4-7). This section shows the high- and
low-value extremes for a number of disk volume performance parameters and thus
makes it easy to see whether the disk volume subsystem may be presenting difficulties.
For a properly balanced system, the high and low values should be as close together as
possible.
In Example 4-7
, for example, you can see how unevenly the cache calls are distributed
among the disk volumes on this node. Ideally, that is, if the node were perfectly
balanced, the nine volumes in the system would each have about 11 percent of all cache
calls.
Example 4-5. Global Performance Indicators for \NODEB
III. GLOBAL PERFORMANCE INDICATORS
EXCESSIVE DISPATCHING : NO INDEX LEVELS > 2 : NO
PROCESSOR LOAD BALANCE : FAIR OVER UTILIZED DISK : NO
OVER UTILIZED NODE : NO CACHE FAULT DETECTED : NO
OVER UTILIZED CPU : NO TRANSIENT PROCESSING : NO
DISK VOLUME QUEUING : YES BLOCKED REQUESTS : NO
AVERAGE CACHE HIT % :91.38% TOTAL CACHE CALL RATE: 31.00 /SEC
Example 4-6. Global Performance Indicators for \NODEC
III. GLOBAL PERFORMANCE INDICATORS
EXCESSIVE DISPATCHING : NO INDEX LEVELS > 2 : NO
PROCESSOR LOAD BALANCE : POOR OVER UTILIZED DISK : NO
OVER UTILIZED NODE : NO CACHE FAULT DETECTED : NO
OVER UTILIZED CPU : NO TRANSIENT PROCESSING : NO
DISK VOLUME QUEUING : NO BLOCKED REQUESTS : NO
AVERAGE CACHE HIT % : 88.93% TOTAL CACHE CALL RATE: 461.00 /SEC