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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you are still learning, I would advise to install the prometheus/grafana stack: https://github.com/prometheus-community/helm-charts It'll give you a nice dashboard of the resource usage of the different parts of your cluster. This way you can better determine the necessary resources.
NOTE:
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