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11 Performance
Considerations
Memory
The memory requirements of an SPS procedure varies depending on the number of
printers that are to be run under one procedure and the size and number of buffers
allocated for each printer. Another consideration is whether SPS re-entrant parts are in
lpalib, linklib or a steplib. Storage estimates are given below for PP/ROUTER printers
Substantial real storage savings can be achieved when multiple printers are being driven,
by SPS depending on how it is installed. The use of linklib or steplib will cause a copy of
SPS to be loaded into each SPS address space. Each SPS address space will use a
separate real storage copy of SPS. An installation that has the re-entrant portions of SPS
in lpalib will only require one copy of SPS for the entire system regardless of the number
of SPS procedures. Therefore, if a steplib or linklib approach has been used, it is better to
have multiple printers driven by each SPS procedure. If an lpalib approach has been
used, there is little advantage in having more than one printer per SPS procedure.
Most SPS code and dynamic areas are located above the line. Just some code and areas
must remain below the line because of system restrictions and compatibility reasons. Data
management buffers and control blocks ( trace files, system resource libraries) are
located below the line and may take quite a large amount of storage. Trace files have 20
IO-buffers per default. The region estimation below is always given in the form xxx(yyy),
where xxx are the requirements below the line and yyy are the requirements above the
line.
PP/ROUTER Storage Estimates
When PP/ROUTER is located in a linklib or steplib and the default buffer allocations are
used, an installation should allocate 200K(1.3M) of virtual storage for the first driver in a
procedure and 200K(800K) for each additional driver to run under that procedure. Using
these estimates an installation using steplib or linklib driving 2 printers with one procedure
and 1 printer with another procedure would require 400K(2.1M) in one procedure and
200K(1.3M) in the other.
Summary of Contents for PRISMAproduction
Page 1: ...Océ PRISMAproduction ROUTER V1 0 Reference Guide ...
Page 50: ......
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Page 71: ...SPS Start up Procedures U20944 J Z247 6 7600 ...
Page 96: ...Maintenance U20944 J Z247 6 7600 ...
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Page 132: ...U20944 J Z247 6 7600 ...
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