2.8.1 Global buffers

HADB uses global buffers for a database's I/O processing.

A global buffer is an area that is used for the input and output of data stored in a DB area on a disk. Global buffers are allocated in the shared memory. The following figure shows the global buffer concept.

Figure 2‒31: Global buffer concept

A global buffer must always be allocated for any data DB area that stores tables and indexes. You can allocate any single global buffer to one or more DB areas.

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