ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[08004] [1040] Too many connections

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[08004] [1040] Too many connections in /home/nikielm/sites/nikiel.net/www/drzewo/includes/classes/class_pgv_db.php on line 405