Correcting For Printer Performance Issues - Os/2 - Xerox DocuPrint 92C Installation Planning Manual

DEFINING THE PRINTER TO THE HOST: TCP/IP ATTACHMENT
Correcting for printer performance issues – OS/2
E-34
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The OS/2 TCP/IP stack has been initialized (usually done
during system bootup). The TCP/IP NETSTAT command
has several options which may reveal network problems.
•
The OS/2 queue is not in a "Hold" state.
•
A data stream is arriving at the IPS. The IPS Printer Control
Unit status on the IPS user interface screen should go from
"idle" to "receiving" during reception of the data stream. If it
does not, verify that the correct IP address and TCP/IP Port
Number are specified to both PSF/2 and the printer.
6. You may examine the contents of the spool queue by opening
the queue object on the OS/2 desktop. An entry should appear
during the execution of APRINT, then change to a status of
"Printing" before disappearing from the queue.
If OS/2 detects an error during printing, the entry is held in the
queue with an appropriate status indicating the error. If the
entry never changes status to "Printing," either the queue or the
entry is in a "Hold" state, or OS/2 is unable to contact the printer
to initiate printing.
If the entry enters a "Printing" state then disappears, but no
output was produced on the IPS printer, check to see if the
output was printed elsewhere. This would indicate a definition in
either TCP/IP or PSF/2 that is incorrect, but still happens to
match the device where the output appeared.
Should you notice any printer performance problems—e.g.,
throughput speed degradation, check the areas listed in the following
table.
Table E-28.Components to check for printer performance
OS/2 On the OS/2 system, a system-changeable priority controls the
resources allocated to printing activities. By default this is set to
a median value, representing the relatively low priority printing
has on a typical desktop system. In the case of a print server, it
may be appropriate to increase this value to favor printing over
any other activities that may be going on. To change this setting:
1. Select the OS/2 System folder from the OS/2 Desktop.
2. Select the System Setup folder.
3. Select the Spooler icon.
4. Select the Print Priority tab from the Spooler Settings
dialog box.
5. Print Priority values range from 1 to 189, with a default of
95. Adjust the setting accordingly and close the Settings
dialog box.
Overcommitment of memory can lead to severe reduction of
throughput under OS/2. If there is excessive paging activity (to
the SWAPPER.DAT file) or the swap dataset becomes too large,
consider increasing the physical memory on the print server.
This often can lead to greater performance gains than, for
example, use of a faster processor.
problems – OS/2
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