title: what will happend to unreceived data in socket programming (python)؟
body: <p>I'm using python socket programming and zmq to transfer high-resolution images from server to client to process them.
  there is a problem here .when the receiver is processing the received image this process takes a while and there is a ram limit on the server, in this case when the receiver will try to process an image, no image will be received by the receiver and I guess the image will accumulate in server RAM to client ask to receive them from the server.
  I wanna know if there is any way to find out how many images are accumulated in RAM from the server or client???</p>