Database Reference
In-Depth Information
FATAL: remaining connection slots are reserved
for non-replication superuser connections
All database plans on Heroku Postgres have a maximum number of connections; this error
is generated when the number of connections has been reached. Also, it indicates that there
are a number of connections reserved for the Heroku team:
FATAL: remaining connection slots are reserved for
non-replication superuser connections
The indicated solution for this problem is to search for idle connections and kill their pro-
cesses. Another suggestion is to migrate to a database plan that supports a higher number of
connections.
