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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.
And yes, a RAM upgrade is always better than having to use swap at all. But if you can't afford one right now, I suggest you to take a look at this
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Hence, a higher number means a more popular project.