Saturday, July 19, 2008

Oracle Dynamic Performance Views Architecture

The architecture of the Oracle Dynamic Performance Views is a stack of 3 levels of abstraction. At the lowest level, it consists of X$ views based upon C data structures. V_$ views are created over the X$ views and they are accessed through V$ synonyms.

Layers (lowest to highest):
X$ views from C data structures
V_$ views over X$ views
V$ synonyms to V_$ views

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