On workstations running NPRINTER, throughput is affected by the buffer size defined for the printer. On dedicated workstations, no non-printing resources require memory on the machine, so larger buffers will speed up your printing without degrading the performance of other workstation tasks.
With no load on the network, maximum data rate can be achieved with any buffer size larger than 5KB. The default buffer size is 3KB. As network traffic increases, packet delays decrease throughput for any buffer size. For very busy networks, a buffer size of 20KB may be desirable to ensure having enough data stored to carry over long packet delays. The buffer size needed for maximum data throughput will range from 6KB to 20KB depending on the traffic load on any particular network.
On non-dedicated workstations, you should normally use the default buffer size of 3KB. A high buffer size may slow down your workstation because it requires more memory, even though printing speed may increase.
Try different settings to get best performance from your own setup. For example, if the printer is printing a lot of graphics data, you may want to increase the buffer size.