As I look on the metrics of my apps I see a max of 400 connections. I don't know if this is sizable....
This is in the help (of v3) :
4.4.3 Database Connections
The database connections graph shows the number of connections to the PostgreSQL server. This should go up and down with the usage of the application. The number of connections is limited to 50.
And v4 :
5.4.3 Database Connections
The database connections graph shows the number of connections to the PostgreSQL server. This should go up and down with the usage of the application. The number of connections is limited to 50.