A set of shared memory enhancements were introduced in OpenEdge Release 10.1B that enable increased shared memory addressability and better management of the shared memory allocation process. Increased shared memory addressability allows larger pools of shared memory for databases, which can reduce operating system resource requirements. The ability to customize shared memory allocation allows user specified shared memory segment sizing to meet the needs of specific environments. This paper describes the extent of the changes concentrating on 32- & 45-bit platforms, and describes how the changes will affect OpenEdge in your particular environment.