Max Connections Limit Error
SafeMySQL: 1203 User some_db_username already has more than ‘max_user_connections’ active connections
then you reached your server limit for database simultaneous connections. You can rather ask your hosting to increase max_connections for MySQL or you can try to switch plugin to WP wrapper for DB operations. You can enable this if you add to your wp-config.php next line:
define('WP_USE_EXT_MYSQL', false); define('FF_USE_WPDB', true);
and deactivating/activating plugin after.
Though WP wrapper is less performant but it requires at the same time less server resources which can help if your server struggles to handle and update a lot of streams.