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Status Delivered
Workspace Instana
Categories Agent
Created by Guest
Created on Jan 18, 2023

On agents, create the ability to only specify certain sensors instead of trying to implement all possible sensors

We've found that it's really difficult to blacklist certain agent sensors since there are so many different processes on developer workstations that run with .net or java.   It starts to collect information on a lot of products and you have to spend a lot of time eliminating sensors.  We want the Instana agent to be as small of a memory/cpu footprint on these machines as we already have a lot of processes running on these machines.   It would be great if we could just specify which sensor(s) to run.   


The other issue is that when memory is low on a machine, I find that it gets stuck trying to see if a specific sensor can find anything and just keeps trying and the agent uses an entire CPU core.  It gets stuck on something we don't even use.   We really just want it to monitor our java development environment since this is where are development code really runs.   This should reduce the CPU footprint on our development machines.   We haven't deployed out to the development machines because of the poor performance with the agent.   I had opened a ticket on this, but couldn't be replicated on the Instana support machines.      

Idea priority Medium
  • Admin
    Henning Treu
    Feb 19, 2026

    The related Aha! idea for selecting based on technology and process properties is here: https://automation-management.ideas.ibm.com/ideas/INSTANA-I-4512

  • Admin
    Henning Treu
    Feb 19, 2026

    Hi Martin, thanks for the prompt reply!

    I acknowledge your requirement to monitor based on technologies. I'm open to discuss how we can extend Selective Monitoring, to also allow technology-based filtering of what gets monitored.

    Disabling sensors via configureation.yaml may work, but is not meant to be the solution here. Disabling individual sensors is a way to debug certain situations, but not meant to be the control for opt-in / opt-out. The required list of sensors is sensitive and critical to the correct function of the agent.

    If you agree, I will open a new Aha! idea for extension of Selective Monitoring by technology (and other process properties, like process name, arguments and arbitrary environment variables).


    Best

    Henning

  • Guest
    Feb 19, 2026

    Selective monitoring is not the same as disabling unwanted sensors.
    Selective monitoring requires changing the processes to use an opt in env variable - meaning everything we want to monitor needs to have it's startup edited to add the variable and then restarted.
    This means we need to edit and restart literally thousands of processes across the enterprise.

    We have had to implement a scripted solution to produce a configuration.yaml file with all irrelevant sensors disabled - and only certain sensors enabled. This achieves the goal without us having to restart anything but the instana agent itself.
    It would be sensible for instana to have this feature natively.

  • Admin
    Henning Treu
    Feb 19, 2026

    This is available with "Instana Selective Monitoring" on a process level. Opt-in and opt-out mode is supported.

    Documentation is life here: https://www.ibm.com/docs/en/instana-observability/1.0.313?topic=agents-instana-selective-monitoring