How is the memory utilization computed for devices that support the UC Davis MIB in Spectrum?

Products

• CA Spectrum
• Network Observability

Issue/Introduction

Some devices modeled that use the UC Davis MIB in Spectrum are getting the "HIGH AGGREGATE MEMORY UTILIZATION". How is the memory utilization computed for devices that support the UC Davis MIB?

Environment

DX NetOps Spectrum: all releases

Resolution

Spectrum uses the following formula to calculate memory utilization for devices that support the UC Davis mib:

((memTotalReal - (memAvailreal + memCached + memBuffer)) / memTotalReal) * 100 

Where

memAvailReal attribute id 0x3d00ae 

memTotalReal attribute id 0x3d00ad 

memCached    attribute id 0x3d00b7 

memBuffer    attribute id 0x3d00b6 

These attributes exist on the UCDavisSNMPApp model associated with the device model.