Extended Dynamic Shared-Memory Management

All applications that use data from a particular coserver share data in the memory space of that coserver. After one application reads data from a table fragment that resides on a coserver, other applications can access whatever data is already in memory. This sharing of data in memory prevents redundant disk I/O and the corresponding degradation in performance that might otherwise occur.

Each database server or coserver adds memory dynamically as needed, and you, as the administrator, can also add segments to shared memory if necessary. For information on how to add a segment to database server shared memory, refer to Shared Memory.