ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[08006] [7] FATAL: remaining connection slots are reserved for non-replication superuser connections

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[08006] [7] FATAL: remaining connection slots are reserved for non-replication superuser connections in /home/brasto/www/pgv/includes/classes/class_pgv_db.php on line 405