HP QMS 4060 - Manual (Page 160)

Memory
QMS 4060 Print System Reference 5-18
switching prevents unnecessary repetitive downloading and traffic
congestion on networks.
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. The internal hard disk can supplement this cli-
ent 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 lot
of disk access is required, adding memory to the disk cache may
increase the printer’s performance. For example, if many fonts are
stored on disk, faster access to these fonts is achieved by increasing
the disk cache size. When one or more hard disks are installed and
formatted, disk cache is automatically allocated 256 KB.
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.