GPM071I

Explanation
The estimated storage size for the data cache exceeds
the virtual storage size for the server address space. The DDS server
calculates the required storage size by multiplying the measured size
for the first cache slot with the number of configured cache entries
(see CACHESLOTS parameter in GPMSRVxx). The size of the first cache
slot is shown in the SYSPRINT output file. The most probable cause
for this problem is that the REGION size is too small.

System action
The server is terminated with a fatal error.

System programmer response
Check the following items: Increase the REGION size parameter on the JOB or EXEC card.
Make sure that the requested region size is really available to
the server program, for example, check that the IEFUSI system exit
does not reduce the requested region size.
Reduce the number of cache slots in the GPMSRVxx PARMLIB member
(CACHESLOTS option). The default number of slots is 4 and the minimum
number is 3.

Source
Resource Measurement Facility™ (RMF™) - Distributed Data Server (DDS)