> I have modified our IEFUSI in our shop to increase the number of
> dataspaces allowed - sub word 1:
>
> Word 7 The address of a four-word area containing IBM-supplied
default
> values for data spaces, hiperspaces, and data sharing (through the
> IARVSERV macro). These defaults apply only for programs running
> in problem state with user keys. The number of sharing pages,
> address spaces, data spaces and hiperspaces can be limited only
> for jobs running in user keys and in problem state. Jobs running
in
> system key (0-7) or in supervisor state may use unlimited sharing
> pages, data spaces and hiperspaces. The words are defined as
> follows:
> Sub-word Contents
> 1 Default data space and hiperspace size. It is
> specified in blocks of 4K bytes and must be in the
> range of 1-X'00080000'. The IBM-supplied default is
> 956K (X'000000EF' x 4K). <<<<< Ive increased this
max
> 2 Maximum combined size for all user key data
> spaces and hiperspaces that are created by
> application programs owned within an address
> space (in megabytes). The IBM-supplied default
> and the maximum that can be specified is (2**24)-1
> megabytes.
> 3 Maximum number of user-key data spaces and
> hiperspaces created by application programs that
> can exist at any given time for an address space.
> The IBM-supplied default and the maximum number
> that can be specified is (2**32)-1.
> 4 Maximum number of source and target shared
> pages that can be used at one time by problem
> state callers using the IARVSERV SHARE services.
> The IBM-supplied default is 32 (which allows at
> most 16 pages to be shared with 16 other pages;
> the number of pages include source plus target).
> The maximum you can specify is (2**31)-1.
>
> My question is there a control block I can look at to verify? I've
> verified things like REGION, MEMLIMIT.. etc in LDA and RAX data
> areas. Ive used Marks RXSTOR64 to verify things also, but not for
> dataspaces/hiperspaces. Is there such a thing?
>From the RAB mapping in z/OS MVS Data Areas Volume 5 :
224 (E0) UNSIGNED 4 RABDBLDF DEFAULT VALUE FOR THE
NUMBER OF BLOCKS ON
DSPSERV CREATE FOR
THIS ADDRESS SPACE.
228 (E4) UNSIGNED 4 RABDMXEX MAXIMUM NUMBER OF
USER KEY DATA SPACES
THAT MAY EXIST AT ONE
TIME FOR THIS ADDRESS
SPACE
232 (E8) UNSIGNED 4 RABDMXSZ MAXIMUM NUMBER OF
MEGABYTES OF USER KEY
DATA SPACE ALLOWED
FOR THIS ADDRESS
SPACE
The RAB is not a programming interface, and no DSECT is provided for it.
Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY
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