Tcp receive buffer full

1. What happens when TCP receive buffer is full?
2. What is TCP receive buffer?
3. How do I clear TCP buffer?
4. What happens to receiving computer if the TCP buffer is full of segments waiting to be read due to workload in the receiving computer?

What happens when TCP receive buffer is full?

If the TCP/IP buffers are too large and applications are not processing data fast enough, paging can increase. The goal is to specify a value large enough to avoid flow control, but not so large that the buffer accumulates more data than the system can process.

What is TCP receive buffer?

Simply put, a TCP Receive Window is a buffer on each side of the TCP connection that temporarily holds incoming data. The data in this buffer is sent to the application, clearing more room for incoming data.

How do I clear TCP buffer?

The only way to "flush" the receive buffer is to read from it. After the first read, keep reading from the socket, throwing that data away, until there is no more data available to read. Use select() with a timeout to detect when the socket is still receiving data.

What happens to receiving computer if the TCP buffer is full of segments waiting to be read due to workload in the receiving computer?

When the receive buffer is full, the receiving system advertises a receive window size of zero. The sending system must pause and temporarily cannot send any more data. In general, more frequent occurrences of zero size for the receive window results in overall slower data transmission across the network.