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The SGA (System Global Area) is a section of server memory allocated to the database for caching objects for reuse by multiple sessions -- data blocks, object definitions, compiled procedures, etc.
The size and substructure of the SGA can have a profound impact on database performance. The efficiency with which the database can reuse previously accessed information can depend partly upon the amount of memory allocated within the SGA.
This module allows you to observe the substructure of the SGA, in order to make informed decisions about memory allocation.
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