This property determines whether and how instances of the area can be displaced. Displacement may be necessary if the available addressing area of the shared memory is not sufficient for all area instance versions. This may be the case in 32-bit systems, but should not be an issue for 64-bit systems.

Possible displacement types are:

Displacement takes place only if no area handle is bound to the area instance at the same time, or if there are no locks on the area instance. This means that only those area instances can be displaced that have exactly one version (the active version) with no read lock at the time of displacement.