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Status Future consideration
Workspace Instana
Categories Java
Created by Guest
Created on Mar 1, 2023

Instana: Ability to disable a micrometer metric (EhCache metric has known performance/out of memory issues)

Currently in Instana you have the ability to either enable or disable the entire micrometer collection.
You don't have the ability to disable one or some of its metrics.

The EhCache metric has known performance/out of memory issues when dealing with large caches.

Micrometer itself has the ability to disable some metrics via the application.yml file.
Instana does not support this and should.


Helpful URLs:

The configured limit of 1.000 object references was reached while attempting to calculate the size of the object graph 

Performance issue reporting EhCache metrics with a large cache #1584 
#Disable cache.size metrics for ehcache since they are so big, it is expensive to compute
management.metrics.enable.cache.size: false
# cache.local metrics is related to the size of the cache in memory, also expensive
management.metrics.enable.cache.local: false

What happens when maxDepthExceededBehavior is abort 
And so if you meet the "abort" stage for a lot of your cached objects, the impact is that ehcache will think your objects are smaller than they actually are...and as such you may have a larger cache footprint in heap that what you set in your cache size limit.

Spring Boot Actuator/Micrometer Metrics Disable Some 
Let me elaborate on the answer posted by checketts with a few examples. 
You can enable/disable certain metrics in your application.yml like this:
    tomcat: true
    jvm: false
    process: false

Idea priority Urgent