Huge memory consumption in EF2 Oracle extension

[AntonioSousa]

I have a very simple EF2 Oracle extension, that is something like this (has been redacted):

name: custom:abs021
minDynatraceVersion: 1.299.0
author:
  name: Marketware
version: 0.0.5
sqlOracle:
  - group: abs021
    query: select count(*) as events_lat_30min from table
    metrics:
      - key: abs021.quantity
        value: col:events_lat_30min
        type: gauge
    interval:
      minutes: 15

I have two monitoring configurations, two different Oracle instances. They have been consuming around 100 MB each:

Is someone capable of confirming this memory need for each monitoring configuration is really needed? Is there someway to optimize this consumption?