MAXPST= parameter for procedures
Use the MAXPST= parameter in procedure to specify the maximum number of blocks that the user permits the online control region to allocate.
The default is 255; the maximum is 4095. When system activity increases, IMS allocates PST blocks up to the maximum specified. When the workload diminishes, these blocks are unallocated and storage is released to as low as the value specified by PST=.
An example of how these parameters can be specified follows:
Example:
...,PARM='PST=48,MAXPST=300,...Restriction: Reducing the value of the MAXPST parameter from a previous IMS start requires a cold start. Otherwise, results are unpredictable.