APM metric missing for a few nodes in the infrastructure

Products

• CA Application Performance Management (APM / Wily / Introscope)

Issue/Introduction

We are seeing a discrepancy in one of our app LIVE infrastructure where one of the metric called as “Heap used” is missing for few nodes where as its correctly displaying for others.
We use the same Wily agent installation package for all of them, but still there is some ambiguity. Can you please let us know if this metric is derived/calculated from some other configuration, or if this might be some known issue?

 

Environment

Release : 10.7.0

Component : Introscope

Resolution

The Heap Used (%) metric comes from a script called HeapUsedPercentage.js.  By default, it resides in the <EM Home>/examples/scripts directory and you can copy it to the <Collector Home>/scripts directory to run it.  

If you wish to not have this script run, you can always delete it from <EM Home>/scripts.

The reason you see it on one Collector but not another is due to someone copying it manually to the <EM Home>/scripts directory.  By default, it is not in the <EM Home>/scripts directory and to use it, you must manually copy it in.

It is hotconfig, so no need to restart any services if you wish to remove it or add it to another Collector.