Baseline_engine percent algorithm calculation

Products

• DX Unified Infrastructure Management (Nimsoft / UIM)

Issue/Introduction

How does Baseline_Engine probe use the Percent threshold configuration for dynamic alarms ?

Environment

Release: DX UIM 20.4*/23.4
Component: baseline_engine

Resolution

Percent algorithm is based on the [Percent of baseline value + baseline value] for that period. 

 

If Baseline is X and Percent threshold configured is Y%, QoS Value is Q is Compared with ((Y% of X) + X).

 

Example: 

If the baseline value for 3PM - 4PM on Monday is calculated to be 7.0 , and the dynamic alarm algorithm is set to percent and threshold is provided to be >= 10%, then the alarms will be generated if QOS value is reported 7.7 and above.

 

Example 1

 

QOS Value: QOS_CPU_UTILIZATION =17.0

Baseline value = 9.2

Percent Threshold =(100%, 40%, 20%, 10%, 5%) [Critical -> Info]

 

First baseline checks upon configured threshold values:

Critical:

17 > 100% of Baseline + Baseline value

17 > 9.2 + 9.2

17 > 18.2 (False)

 

Major:

17 > 40% of Baseline + Baseline Value

17 > 3.68 + 9.2

17 > 12.88 (True) Alarm is sent

Example 2

 

Similarly for QOS_REACHABLILITY_REACHABILITY =100

Baseline Value = 100.0

Percent Threshold = (50%,80%,90%,95%,99%)[Critical ->Info]

 

Critical:

100 <= 50% of Baseline + baseline

100 <= 50% of 100 + 100

100 <= 150 (True)  Alarm is sent.

Additional Information

Configuring Alarm Thresholds

https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/unified-infrastructure-management/20-1/configuring-alarm-thresholds.html