immudb replica uses too much RAM

[SimoneLazzaris]

What happened

Immudb asynchronous replica uses much more RAM than primary instance (nearly double the amount) in Trustcenter Installation

What you expected to happen

immudb replica should use very low RAM amount when it is not used for queries. Worst case, it shouldn't use more than the primary instance.

How to reproduce it (as minimally and precisely as possible)

We have an example in our CI/CD trustcenter installation, we can dump the DB if needed.

Environment

# run "immu* version" and copy/paste the output here

Additional info (any other context about the problem)