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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.
You could allocate ~1.5mB of psram (out of the 4mb total in the primary bank) and maintain your own rapid-access cache there, perhaps by using ESP32-PsRamFS? (assuming it doesn't suffer from the same "FS" slowness)
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