Printronix Integrated Network Interface Card manual Databufferpoolsize, Smalldatabufferpoolsize

Chapter 6 Configuring PSF for z/OS to Print IPDS Files

DATABUFFERPOOLSIZE

The DATABUFFERPOOLSIZE statement defines the number and size of the data buffers. For printing on TCP/IP-attached printers, it is recommended that you specify at least 160 data buffers, 32768 buffer size.

SMALLDATABUFFERPOOLSIZE

The SMALLDATABUFFERPOOLSIZE statement defines the number of small data buffers. For printing on TCP/IP-attached printers, it is recommended that you specify at least 256 small data buffers.

TINYDATABUFFERPOOLSIZE

The TINYDATABUFFERPOOLSIZE statement defines the number of tiny data buffers. For printing on TCP/IP-attached printers, it is recommended that you specify at least 256 tiny data buffers.

KEEPALIVEOPTIONS

PSF relies on TCP to detect when a connection with a TCP/IP- attached printer is no longer usable. When no data has been exchanged between PSF and its connection partner, TCP sends keep-alive probes to the connection partner periodically. These periodic probes, called keep-alive transmissions, enable TCP to discover when a connection is no longer usable even if the connection partner is abruptly powered off or is no longer accessible through the network.

The frequency of keep-alive transmissions is controlled by the INTERVAL parameter on the KEEPALIVEOPTIONS statement. The frequency applies to all TCP applications that direct TCP to send keep-alive transmissions. The default frequency is after about two hours of inactivity.

For printing on TCP/IP-attached printers, it is recommended that you specify a shorter interval than the default, such as 10 minutes, for the interval between keep-alive transmissions.

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