SeeView Manual

Running the SeeView Program
HP NonStop SeeView Manual—526355-004
A-2
Startup Values
option
specifies any standard TACL run option. For a description of the standard TACL
run options, see the TACL Reference Manual.
statement
specifies one or more SeeView statements described in Section 9, SeeView
Statements and Script Symbols.
Startup Values
The SeeView program has several default settings that you can change before
SeeView startup. Enter the statements at the TACL prompt before starting the SeeView
program.
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PARAM CACHE cache-pages: This parameter specifies the total size of the
cache pool used by the SeeView program to hold individual tasks’ caches. The
cache pool is allocated evenly among the total number of task control blocks
available unless a task or ?MENU statement specifies another value with the
CACHEPAGES option. Thus, normally each ?MENU or task gets an equal
fractional amount of the total cache pages available when it is declared.
The value passed in this PARAM cache-pages is a value in pages. Each cache
page is 2048 bytes in size, and the default is 2048 pages (which is split up among
all your tasks).
PARAM EXTENSIBLE cache-pages: This parameter defines the total number of
memory pages allocated for user task caches and symbols. PARAM EXTENSIBLE
allocates an extensible cache segment for SeeView cache so that disk space for
cache memory pages is allocated only as needed.
If you specify PARAM EXTENSIBLE extensible-pages and do not specify
PARAM CACHE cache-pages, the extensible-pages value specifies the size
of extensible cache. If you specify both parameters, the extensible-pages
value is used only as a Boolean to indicate whether the cache is extensible.
If the disk volume for SeeView cache does not have enough disk space, SeeView
might abend with an “ABEND No disk space available for extensible segment”
message.
The difference between extensible and nonextensible cache is that the disk space
for extensible cache is allocated as needed. If space is not available when needed,
SeeView can abend long after it was originally started. However, all of the disk
space for a non-extensible cache is immediately allocated at SeeView runtime. If
space is not initially available, SeeView abends immediately.
Depending on applied usage, certain applications might need to settle allocation
issues at run time, and others might be able to use extensible space allocation.