Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (P)
Guardian Procedure Calls Reference Manual—522629-013
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PROCESS_SPAWN_ Procedure
Z^OSSOptions
The valid value for Z^OSSOPTIONS is as follows:
Z^MainStackMax
specifies the maximum size, in bytes, of the process main stack. The specified
size cannot exceed 32 MB.
The default value of 0D indicates that the main stack can grow to 1MB. For most
processes, the default value is adequate.
Z^HeapMax
for native processes only, specifies the maximum size, in bytes, of the process
heap. Note that the sum of the size of the heap and the size of global data cannot
exceed 384 MB.
The default value of 0D indicates that the heap can grow to the default value of 16
MB. The initial heap size of a process is zero bytes. For most processes, the
default value is adequate.
Z^SpaceGuarantee
specifies the minimum size, in bytes, of the amount of space that the process
reserves with the Kernel-Managed Swap Facility for swapping. For more
information on this facility, refer to the
Kernel-Managed Swap Facility (KMSF)
Manual. The value provided is rounded up to a page size boundary of the
processor. If the requested amount of space is not available,
PROCESS_SPAWN_ returns error 55.
When the default value of 0D is used, the amount of space reserved is determined
by the value specified in the object file for a native process or by the operating
system for a TNS or accelerated process.
Name (ZSYS^VAL^ ) Value Description
PSpawnOpt^OSSDefault 0 The default value is the only value available.