The size of the transmission buffers can affect the performance of VTAM communication. As you set up the communications server, decide what buffer size is best by considering:
The data size is determined by the client and not by CA-L-Serv. If incoming data is too large to fit in a single transmission buffer, CA-L-Serv breaks it up and stores it in several buffers. CA-L-Serv recombines the data before delivering it to the receiving client.
For example, if a client is transmitting 7 K of data and the transmission buffers are 4 K each, CA-L-Serv breaks up and recombines data as shown here:
There is overhead involved in breaking up and recombining data. Try to minimize the number of times CA-L-Serv does this by establishing the appropriate buffer size.
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