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assign a higher priority to the print spooler
increase the size of the host's output buffer
dedicate a communication controller to the printer
Solving system performance problems with IBM–compatible PC's varies depending
upon the operating system (OS/2 or DOS) and the speed and manufacturer of the PC.
Performance problems with networked printers are best left to the expertise of the
network administrator, since each element between the printer and the host computer
can affect performance.
There will be cases where the desired printout is sufficiently complex to exceed the
bandwidth of the controller. This will be evident if the printer is exerting the
communication flow control for extended periods of time followed by a printer
pause. Assuming that the software application has already been tuned for efficiency,
under these circumstances, do the following:
1. Check to see if the minimum amount of memory is installed (see Appendix A).
2. Try changing the font cache memory allocation based upon the size of characters
being sent. See the "Maximum Cached Characters" topic in the "Configuration"
chapter of the User's Manual for details.
3. Set the Image Width to the minimum width required for the print job.
4. Try to minimize the number of font changes per page.
5. Try to decrease the printing resolution (400 DPI to 300 DPI, or 300 DPI to 240
DPI).
6. Decrease the complexity and/or number of characters in the printed output.
For application efficiency in IGP/PGL or IGP/VGL, it is best to store a form in the
printer and then execute it with dynamic data, rather than send the entire form each
time. Also if possible, eliminate sending white space (spaces or tabs) at the end of
lines if it is not necessary.
Host I/O Interfaces
F–5
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