Will r2d2 create more connections than max_size when using builder()? about r2d2

[sfackler]

The maximum size is the maximum number of connections the pool will maintain concurrently.

[RKochenderfer]

So just to clarify for myself as I'm relatively inexperienced with connection pooling, if there are currently 4 connections being used and a 5th one needs to be made, will r2d2 make the 5th connection wait till another connection is dropped or will it make a 5th connection that isn't maintained by the pool?

[sfackler]

If the number of active connections is at the max_size, the pool will not make more connections.