How user connectivity happens in the database.

Hello LinkedIn Community! 👋

Ever wondered what happens behind the scenes when you connect to an Oracle database? 🤔

Let's dive into the world of database connections simply and easily!

• A new user connection in Oracle starts with the Oracle listener, which accepts incoming connection requests.
• The listener directs connections to the appropriate Oracle instance based on the specified service name or system identifier (SID).
• Process Monitor (PMON) takes over, managing various aspects of user sessions, including cleaning up resources for terminated or failed sessions.
• User credentials are verified against the database's base tables to ensure accuracy.
• Upon successful verification, the database creates a server process on the server side.
• The server process is responsible for executing the user's SQL statements and managing the associated session.
• As part of the connection process, the database allocates Program Global Area (PGA) memory for the user's session.
• PGA memory facilitates efficient handling of the user's interactions with the database.
• This orchestrated sequence of steps ensures a secure and controlled initiation of user connections within the Oracle database environment.

Feel free to share your thoughts or ask questions.