Beginning Oracle Database 11g Administration From Novice to Professional

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CHAPTER 3 ORACLE ARCHITECTURE
Figure 3-1. The Spotlight tool’s diagrammatic representation of the Oracle engine
Sessions panel represents the users who are using the database.
Host panel represents the host computer of the database.
Server Processes panel represents the computer processes on the host computer
that are performing all the work requested by the users.
SGA panel represents an area of computer memory that is used as a work area
by the database. SGA stands for System Global Area.
Background Processes panel represents a core set of computer processes that
are independent of the user sessions and perform specialized tasks such as storing
information about transactions in the redo log files.
Disk Storage panel represents the files in which the data is stored and supporting
files such as redo log files and archived redo log files.
The other terms used in the diagram are explained in the following sections.