Could the MongoDB metrics available in Datadog get expanded to include total memory? For setting up thresholds to track the resident memory of each client, it would be ideal to standardize these thresholds across clients. To do so would require displaying resident memory as a percentage, which would the total memory to calculate for each client. Please let me know if total memory can be a metric available in the Datadog integration or perhaps how I can find it if it already exist or can be created.