Oralce Architectural Components

Process Structure

Oracle takes advantage of various types of processes:

1)??????? User process: Started at the time a database user requests connection to the Oracle server

2)??????? Server process :Connects to the Oracle instance and is started when a user establishes a session

3)??????? Background process: Started when an Oracle instance is started

oracle有三种进程,分别为user process,server process,background process

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User Process

1)??????? A program that request interaction with the Oracle server

2)??????? Must first establish a connection

3)??????? Does not interact directly with the Oracle server

Server Process

1)??????? A program that directly interacts with the Oracle server

2)??????? Fulfills call generated and returns results

3)???????