Min connections for pooling

[zekenie]

Is there any plans for a minimum connections in pool option?

[NatalieWolfe]

Can you provide a use case for this? I don't see any benefits from this. Letting the pool naturally fill will keep your resource usage lower and once it is filled there is no difference between pre-filling and usage-based filling.

[ajostergaard]

The typical use cases are 1/. dealing with situations where connection setup might be slow (db in the cloud somewhere perhaps?!?) and 2/. having a way to be sure that the DB is connected i.e. for server health - green light when we have a DB connection, red light otherwise.

[dougwilson]

PR #505 implements this though minIdle and initialSize