em/global_area_MB is a SAP Parameter attribute which is used to control Size of the extended global memory area (EG) im MB information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
em/global_area_MB profile paramerter attributes
Parameter Name: em/global_area_MB
Description: Size of the extended global memory area (EG) im MB
Default Value: (min($(em/initial_size_MB) * 0.05, 32000))
Parameter Type ( See
IF_PARAMETER_TYPES)
: Integer range(INT_RANGE)
Restriction Values: 2 64000
Parameter Unit: MB
Parameter Group: ExtMemory
CSN Component: BC-CST-MM
System-Wide parameter: No
Dynamic Parameter: No
Vector Parameter: No
Has Sub-Parameters: No
Check Function Exists: No
Parameter documentation
This value specifies the maximum size of the part of extended memory
(see also parameter em/initial_size_MB> or
em/address_space_MB) that is reserved for global data, that is,
user-independent and work process-independent data.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.