TCPBUFFERSIZE

Specifies the size of the TCP/IP send and receive buffers used to replicate data between InfoSphere® CDC and the remote system. This value is used to set SO_SNDBUF and SO_RCVBUF for all the TCP/IP ports used for replication.

This parameter permits the overriding of the sizes of the TCP send and receive buffers that are specified by the TCP/IP component of z/OS®. Generally, accepting the values that are specified by the TCP/IP component by setting this parameter to 0 is the best approach. Overriding the values that are specified by the TCP/IP component is only necessary in exceptional circumstances.

If this keyword is not specified, or a value of 0 is specified, the default values configured for the TCP/IP stack send and receive buffers are used. These are specified by the TCPSENDBfrsize and TCPRCVBufrsize parameter on the TCPCONFIG statement. Consult the z/OS Communications Server documentation for more details.

In order to obtain the best throughput for replication activities, a value between 64K and 256K should be used.

For this keyword, specify the number of bytes or kilobytes (K or k).

Default Setting—0

Maximum Setting—256K

Minimum Setting—256