With 64-bit addressing, you can have larger buffer pools to reduce the amount of I/O operations to obtain data from disks. Because 64-bit platforms allow for larger memory-address space, the maximum values for the following memory-related configuration parameters are larger on 64-bit platforms:
The machine notes for each 64-bit platform lists the maximum values for these configuration parameters and platform-specific parameters such as SHMMAX. For more information about the configuration parameters, see the IBM Informix Dynamic Server Administrator's Reference and the chapter on shared memory in the IBM Informix Dynamic Server Performance Guide.
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