10 Questions
Which components make up the Oracle DB server architecture?
Oracle instance and Oracle database
What is the purpose of a client process in a database server?
To request a connection to the Oracle server
Can a server process run on a host other than the database host?
No
What is the role of background processes in the Oracle database?
To perform maintenance tasks
What is the application architecture in the context of Oracle database?
The computing environment for running applications
Which of the following is NOT a type of process in a database server?
Application process
What is the combination of the SGA and Oracle processes called?
Oracle instance
Which process is started when a user establishes a session and can read and write into SGA?
Server process
What is the Oracle database referred to as?
Storage structure
When are background processes started in an Oracle instance?
When the instance is started
Study Notes
Components of Oracle DB Server Architecture
- Oracle DB server architecture comprises client processes, server processes, and background processes
- Server process communicates with client process on behalf of the database
Client Process
- A client process is a user process that submits a SQL request to the database
- Its purpose is to initiate a database connection and send requests to the database server
Server Process
- A server process runs on the database host, but can also run on a host other than the database host
- It communicates with the client process and accesses the database on behalf of the client
Background Processes
- Background processes perform maintenance tasks, such as database recovery and archiving redo logs
- They run in the background, making the database more efficient and responsive
Application Architecture
- Application architecture in Oracle database consists of a client process, server process, and background processes
- It is a multi-tier architecture, with the presentation tier, application tier, and database tier
Types of Processes
- There are three types of processes: client process, server process, and background process
- There is no such thing as a "user process" in an Oracle database server
SGA and Oracle Processes
- The combination of the System Global Area (SGA) and Oracle processes is called an Oracle instance
- The SGA is a shared memory area that contains data and control information for the Oracle instance
User Session
- When a user establishes a session, a server process is started, which can read and write into the SGA
- This server process is dedicated to the user session
Oracle Instance
- An Oracle instance is referred to as the Oracle database
- It is a set of background processes and shared memory used to manage the database files
Starting Background Processes
- Background processes are started when an Oracle instance is started
- The database is not available until all background processes have been started
Test your knowledge of Oracle database architecture with this quiz. Learn about the components of an Oracle instance and database, as well as the process structure.
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