public static function listConfig() {
		if( static::$configs !== null ) {
			return static::$configs;
		}
		$cache = new APCache('sqladapter', 'db_configs', 2*3600);
		if( !$cache->get($configs) ) {
			$fileCconfig = IniConfig::build(DBCONF, true, false)->all;
			$configs	= array();
			foreach( $fileCconfig as $key => $value ) {
				if( is_array($value) ) {
					// Instance config
					$configs[$key]	= $value;
					
				} else {
					// Instance config property
					if( !isset($configs['default']) ) {
						$configs['default']	= array();
					}
					$configs['default'][$key] = $value;
				}
			}
			$cache->set($configs);
		}
		return static::$configs = $configs;
	}