HP QMS 1660E - Manual (Page 118)

Memory
QMS 1660E Print System Reference 5-20
Normally, this memory client doesn’t need to be changed unless you
plan to download many different non-PostScript fonts.
Spool Buffers
Also known as Host Input and K Mem for Spool, this memory client
stores incoming data from all the interfaces until the emulation can
process the print job. When enough memory is allocated to this client,
the host becomes free more quickly, and the number of jobs that the
printer can accept simultaneously is increased. You should consider
the amount of data being sent simultaneously when allocating mem-
ory to the spool buffer. If available, a hard disk can supplement this
client with additional memory needed for spooling. See the “Hard
Disk Management” section later in this chapter.
» Note: While increasing this client is beneficial in reducing network
traffic, throughput is not necessarily increased. In addition, making
this client too large could actually decrease throughput because of
the overhead involved with managing a large spool.
Disk Cache
This memory client stores frequently used data in system memory
instead of continually storing and retrieving it from a hard disk. If a
hard disk is used and a lot of disk access is required, adding memory
to the disk cache may increase the printer’s performance. For exam-
ple, if many fonts are stored on disk, faster access to these fonts is
achieved by increasing the disk cache size. Conversely, if no hard
disk is used, the disk cache should be set to 36 KB until a hard disk is
installed and formatted. However, when one or more hard disks are
installed and formatted, they are not available until the disk cache cli-
ent is increased.
The disk cache is a high speed temporary buffer for data going to and
from the hard disk. It can speed the printer in two ways:
n
Information such as frequently referenced fonts and logos may
still be in the cache and may not have to be pulled off a hard disk
each time they’re needed.
n Information being written to a hard disk can be held in the cache
temporarily until a more convenient time to be written to disk.