This part provides information on the Natural swap pool which is available when you are using either of the following TP monitors:

• CICS
  (where the Natural swap pool is optional in z/VSE environments and not supported in open transaction environments (OTE) on z/OS)

• openUTM
  (where the Natural swap pool is necessary)

The behavior and the functionality of the Natural swap pool is to a large extent identical in these environments. However, differences or TP-monitor-specific features exist. These are marked accordingly in the following texts.

The following topics are covered:

Purpose of a Natural Swap Pool

Natural Swap Pool Operation

Swap Pool Initialization

Dynamic Swap-Pool Reorganization

Defining the Natural Swap Pool

Natural User Area Size Considerations

Swap Pool Data Space

Global Restartable Swap Pool under openUTM

Terminating the Global Swap Pool

Related Topics:

• Natural Swap Pool under CICS in the TP Monitor Interfaces documentation

• Using the Natural Swap Pool under CICS in the TP Monitor Interfaces documentation

• Natural Swap Pool under openUTM in the TP Monitor Interfaces documentation

• Error Messages from the Natural Swap Pool Manager Valid under CICS and openUTM in the Messages and Codes documentation