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GPA Manual for G-series RVUs

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Guardian Performance Analyzer (GPA) Manual – (544977-001) Page 89 of 106
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TOTALS 30 21 25 21 99
SERVER Queue Distribution Analysis - Descending QueueLen Class %
Program Cpu Cpu Cpu Cpu Cls
Name #00 #01 #02 #03 Pct
-------- --- --- --- --- ----
VISAOT 10 10 10 10 42
RCAPS510 5 3 2 4 16
EMULD 4 4 3 4 16
RCAPS550 3 5 1 3 14
RCAPS640 2 2 6
RCAPS610 1 2
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TOTALS 27 26 19 26 99
Implementing GPA Tuning Recommendations
On the basis of its analysis, GPA makes the following kinds of explicit tuning
recommendations:
• Moving primary disk processes to correct a load imbalance on the node.
• Resetting disk cache allocations to improve cache hit performance and/or reduce
disk queuing.
• Moving processes among CPUs to relieve a detected memory shortage problem or
to correct a processor utilization imbalance.
• Reconfiguring the number of disk subprocesses associated with a logical volume.
Note that in making each tuning recommendation for a given run, GPA takes into
account the effect on the system of all previous tuning recommendations for that run.
In this way, GPA is able to issue multiple tuning recommendations in a single analysis.
You can implement the GPA recommendations for moving primary disk processes and
resetting cache allocations simply by running PUP or SCF using the PUPIN or SCFIN
file as input. Note that you must be a super group user to do this. PUPIN contains the
PUP PRIMARY and PUP SETCACHE commands required to perform the
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: