WebSphere® Application Server uses the TCP/IP sockets communication mechanism extensively. For a TCP/IP socket connection, the send and receive buffer sizes define the receive window. The receive window specifies the amount of data that can be sent and not received before the send is interrupted. If too much data is sent, it overruns the buffer and interrupts the transfer. The mechanism that controls data transfer interruptions is referred to as flow control. If the receive window size for TCP/IP buffers is too small, the receive window buffer is frequently overrun, and the flow control mechanism stops the data transfer until the receive buffer is empty.
TCP/IP can be the source of some significant remote method delays.
To change the system wide value, perform the following steps:
Repeat this process until you determine the ideal buffer size.
The TCP/IP buffer sizes are changed. Repeat this process until you determine the ideal buffer size.
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