Specifications

Memory Clients
QMS 4525 Print System Administrator's Guide7-10
(15 KB) is added to the available float memory. Each interface menu
has a mode setting that allows you to disable it.
K Mem for PS Heap
Also known as PS Heap, PostScript VM, and Virtual Memory, this cli-
ent holds downloaded fonts, PostScript operators, and forms.
Inefficiently coded PostScript jobs can consume an infinite amount of
virtual memory or leave objects in the PostScript heap after the print
jobs are completed, leading to virtual memory errors. If not enough
memory is allocated to the PS heap, the job cannot print.
Increasing the memory allocated to this client allows more complex
jobs to print and increases the number of fonts that can be down-
loaded to virtual memory. However, this client should be increased
only if you receive a virtual memory error when attempting to print a
job or download a font and only in small increments until the error
message goes away. Excess memory in the PS heap is not being
used. The system will not allow you to set this memory client below its
minimum setting. The range is 2048 to 12288 KB. The default value is
12288.
If you change the K Mem for PSHeap value, the printer automatically
restarts after you save your change and exit from the menu.
K Mem PS Fonts
Also known as Font Cache and PostScript Font Cache, this memory
client stores bitmapped representations of previously scaled Post-
Script fonts. This process reduces the number of times a font must be
converted from outline form to bitmap form. Printing pages that have
characters already stored in the font cache is immensely faster than
printing characters not yet in the font cache.
As the font cache memory fills, the printer erases bitmapped charac-
ters that have been in the cache longer than the others without being
used to make room for new characters. By increasing the memory
allocated to this client, the printer can store more characters and
spend less time erasing and replacing characters in the cache.