How to the CAPC calculate the Average Memory Utilization

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Article ID: 128983

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Updated On:

Products

CA Infrastructure Management CA Infrastructure Management CA Performance Management - Usage and Administration

Issue/Introduction

The CAPC report show the Average Memory Utilization but is need to know if value is correct
 

Environment

PM 3.6

Resolution

Average Memory Utilization calculate
 
Using as example the vendor certification ‘Cisco CPM Memory’
 
Formula for Utilization:
snmpProtectedDiv ((100.0 * cpmCPUMemoryUsed),(cpmCPUMemoryFree + cpmCPUMemoryUsed))

 
Find the OID’s on Google:
cpmCPUMemoryUsed = 1.3.6.1.4.1.9.9.109.1.1.1.1.12.$1
 
cpmCPUMemoryFree = 1.3.6.1.4.1.9.9.109.1.1.1.1.13.$1
 
OID’s values from Spectrum MIB tools:
cpmCPUMemoryUsed           7          3886600          Gauge 1.3.6.1.4.1.9.9.109.1.1.1.1.12
cpmCPUMemoryFree            7          64080  Gauge 1.3.6.1.4.1.9.9.109.1.1.1.1.13
 
Calculating:
Memory Utilization = cpmCPUMemoryUsed / cpmCPUMemoryUsed + cpmCPUMemoryFree
= (3886600) / (3886600 + 64080)
 
= 3886600 / 3950680
 
= 0.9837800074923811 * 100
 
= 98.37%
 
With this evidence we can to affirm that the Average Memory Utilization calculate is correctly
 
You can to check with Device Administrator if this information is correct
 
Note: If the OID has index the calculate is:
cpmCPUMemoryUsed:
1.3.6.1.4.1.9.9.109.1.1.1.1.12.19, Gauge , 2819964
1.3.6.1.4.1.9.9.109.1.1.1.1.12.20, Gauge , 3107712
 
cpmCPUMemoryFree:
1.3.6.1.4.1.9.9.109.1.1.1.1.13.19, Gauge , 1157900
1.3.6.1.4.1.9.9.109.1.1.1.1.13.20, Gauge , 870152
 
Memory Utilization = cpmCPUMemoryUsed / cpmCPUMemoryUsed + cpmCPUMemoryFree
= (2819964 + 3107712) / ((2819964 + 3107712) + (1157900 + 870152))
 
= 5927676 / (5927676 + 2028052)
 
= 5927676 / 7955728
 
= 0.74508278815 * 100
 
= 74.51%