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Currently, a pg pool was created for each request : this is bad, as each pool keeps a connection to the db so it can reuse it. This caused issue faradayio#36 for me.
By following the example here : https://github.com/brianc/node-postgres/tree/v6.4.1 the pool must be created only once, and reused across requests (that's the purpose of a pool).
For info, this probably origined after the changes made to the pg lib, which switched from a singleton to a pg Pool instance when updating to v6.x