mq 消息最大长度 最大是100M

  (
     QueueManager => "$QueueManager",
     ClientConn   => { 'ChannelName'    => "$ChannelName",
                       'TransportType'  => 'TCP', # Default
                       'ConnectionName' => "$ip($port)",
                       'MaxMsgLength'   => 100 * 1024 * 1024,