Problem statement:

As an ACM Observability User I am able to determine the exact memory and CPU requirement needed for the default Multi-cluster Observability Operator needs to schedule receiver pods for a given number of active series by default

As an ACM Observability User I have confidence in the base performance of a default installation of ACM Multi-cluster Observability Operator component in my Hub Cluster with respect to Max Active Series on ingest 

OCP Example https://docs.openshift.com/container-platform/4.13/scalability_and_performance/planning-your-environment-according-to-object-maximums.html

Mimir example https://grafana.com/docs/mimir/latest/manage/run-production-environment/planning-capacity/#:~:text=Estimated%20required%20CPU%2C%20memory%2C%20and,every%20300%2C000%20series%20in%20memory