F5_memory_utilization_formula

Document ID : KB000072823
Last Modified Date : 16/05/2018
Show Technical Document Details
Introduction:
I would like to know the formula used to calculate memory utilization for F5 devices, and the corresponding OIDs
Environment:
Spectrum 10.x
OS Independant
Instructions:
The Formula for BigIP F5 devices:

( REAL( ( ( ( sysHostMemoryUsed - sysStatMemoryTotal ) + REAL( sysStatMemoryUsed ) ) / REAL( sysHostMemoryTotal ) ) ) * 100 )

OIDs which are polled:

sysHostMemoryUsed = 1.3.6.1.4.1.3375.2.1.7.1.2
sysStatMemoryTotal = 1.3.6.1.4.1.3375.2.1.1.2.1.44
sysStatMemoryUsed = 1.3.6.1.4.1.3375.2.1.1.2.1.45
sysHostMemoryTotal = 1.3.6.1.4.1.3375.2.1.7.1.1