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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.
After a quick google, it looks like WorldQL and Mammoth may be what you want. They say (and show, actually) they've tested it with up to 1000 players over multiple servers (on a single world) and kept a solid 20 TPS.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.