SAP SHM AREA INSTANCE ACCESS documentation, setup help and example usage

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Shared Objects - Area Instance Versions
Shared objects are stored and managed in area instance versions. In an ABAP program, area instance versions and thus shared objects are accessed exclusively by means of area handles. Area locks are set and area instance versions can acquire different states.

Area Handles

Area Locks

States of Area Instance Versions

The transaction SHMM provides an overview of the area instances in the shared objects memory of the current application server, the corresponding locks, and the states of the area instance versions. The class CL_SHM_UTILITIES
is used to query the attributes of area instances in programs.