em/global_area_MB: Size of the Extended Global Memory

This value specifies (in megabytes) the maximum size of that part of extended memory (see also parameter em/initial_size_MB) that is reserved for global data, that is, user-independent and work process-independent data. The amount of data involved is comparatively small (a percentage of the whole extended memory pool), because only administration data belonging to internal communication between SAP kernel components (task handler, enqueue) is stored in the global area.

The default value is platform-specific and is determined dynamically. This is the default value specified in transaction RZ11. This value should not normally be changed.