Error: remaining connection slots are reserved for non-replication superuser connections. sorry, too many clients already

Questions and Answers
4

I’ve explored using connection pooling although have had the following error with both database tool and server:

cross database references are not implemented

I’ve now explored creating and hosting my own PostgreSQL database on a DigitalOcean Ubuntu droplet and the error no longer seems to occur.

So whilst I’ve found a solution or workaround, I am interested as to why this error occurs with DigitalOcean Managed PostgreSQL Database.