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DX APM - Raw metric show values > 0 however calculator shows 0

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Article ID: 257836

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Updated On:

Products

DX Application Performance Management

Issue/Introduction

 

A have a calculator to sum metrics values. The raw metric show values > 0 however calculator metric shows 0 regularly. Why?

 

Environment

DX APM SaaS and onpremise 2.x

Cause

This is an indication of an EM hardware resource issue (CPU)

 

Resolution

Next time the issue occurs, monitor in parallel:

1) the raw metric

2) the affected calculator (showing 0 value)

3) below EM/Collector supportability metrics:

"(Virtual)Custom Metric Agent (Virtual)|Enterprise Manager|Internal|Calculator Harvest Time(ms)" 

"(Virtual)Custom Metric Agent (Virtual)|Enterprise Manager|Health| Harvest Capacity(%)" 


NOTE: to better monitor this unexpected condition, create alerts based on the above 2 metrics, you would need to check their historical data to be able to set the appropriate thresholds values.

Below examples illustrate some unexpected conditions impacting the calculators execution:

 

Additional Information

https://knowledge.broadcom.com/external/article/190815/aiops-troubleshooting-common-issues-and.html

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