This is the storage that is left between the top of the region and the bottom of the high private area. We recommend that 200KB to 300KB of free storage be maintained to allow for use by the termination routines in the case of an abend.
If this free storage is not enough for recovery termination management (RTM) processing, the address space may be terminated with a S40D abend that produces no dump.
This area can be very dynamic. As the high private area grows, it extends down into this area, and the CICS® region may extend upward into this area up to the value specified in IEALIMIT.
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