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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.
Regarding postgres setup, it looks ok, I recommend considering pgx instead of libpq; reason being maintainability, libpq even recommends using pgx instead see README.
With regards to 2. -- also, it looks like there's an important unfixed issue https://github.com/lib/pq/issues/939. I haven't verified whether the issue is up to date.
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