Smarts IP: How does Smarts IP calculate Processor CurrentUtilization for Juniper SA6500 (SysOID: .1.3.6.1.4.1.12532.252.7.1)?

Products

• VMware Smart Assurance

Environment

VMware Smart Assurance - SMARTS

Resolution

Smarts IP calculates Processor CurrentUtilization using the difference/delta between the following three counter value OIDs on consecutive polling cycles:

ssCpuRawIdle = "1.3.6.1.4.1.2021.11.53"
ssCpuRawUser = "1.3.6.1.4.1.2021.11.50"
ssCpuRawSystem = "1.3.6.1.4.1.2021.11.52"

deltaCpuRawIdle   =  (ssCpuRawIdle at time Tn-1) - (ssCpuRawIdle at time Tn)
deltaCpuRawUser   =  (ssCpuRawUser at time Tn-1) - (ssCpuRawUser at time Tn)
deltaCpuRawSystem =  (deltaCpuRawSystem at time Tn-1) - (deltaCpuRawSystem at time Tn)

    * Tn = the time of most recent polling cycle
    * Tn-1 = the time of the previous polling cycle

CurrentUtilization = 100 - ( (100 * deltaCpuRawIdle) / (deltaCpuRawIdle + deltaCpuRawUser + deltaCpuRawSystem) )