15.1. DB2 Memory Allocation: The Big Picture
DB2 allocates memory for three different types of operations.
Instance-level operations: DB2 allocates memory for instance-level operations such as accepting connection requests, starting up support to activate a database, and for inter-partition communication if you have a multi-partition system. This is known as instance-level shared memory since it is shared by all databases in the instance and by all applications connecting to databases in the instance. Figure 15.1 shows the components that make up the instance-level shared memory in the top left corner (Per Instance Global Control Block).
Figure 15.1. The DB2 memory model: the big picture
Database-level operations: DB2 also ...
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