At startup time, systems support can use the parameter service to determine which volumes are to be used for paging. Care is required here to ensure that SYS.PAGING.<vsn> paging files have been set up on the volumes concerned and that the maximum number of 128 volumes is not exceeded.
The paging area initialized at startup should be at least 200 Mbytes in size. If the paging area is smaller than 200 Mbytes, a warning in the form of message NSI5115 is output on the console, but system initialization continues.
If systems support did not specify any parameters for paging file selection, all SYS.PAGING.<vsn> paging files created on the home pubset are automatically used for paging. The parameter service allows volumes for paging areas both within and outside the home pubset to be specified. The statements required for this purpose must be stored in the parameter file by systems support (see the PAGING parameter record in
chapter “Parameter service”).