Oracle 11基于SID管理数据库（oracle11 sid）

Oracle 11g: Managing Databases Based on SID

Oracle 11g is a popular relational database management system used by businesses of all sizes. With its robust features and scalability, it is an ideal choice for managing data in large organizations. One of the key aspects of managing an Oracle 11g database is configuring the System Identifier (SID) parameter.

The SID parameter is a unique identifier that is used to distinguish one instance of an Oracle database from another on a single server. It is important to set up the SID parameter correctly to ensure that the database operates efficiently and effectively. In this article, we will explore the basics of configuring an Oracle 11g database based on the SID parameter.

1. Understanding the SID parameter

The SID parameter is a text string that identifies a specific Oracle database instance. It is used to identify the name of the directory for the control files, redo log files, and data files that make up the database. The SID parameter is set during the installation of the Oracle software, but it can also be modified later if needed.

2. Configuring the SID parameter

To configure the SID parameter, you must update the initialization parameter file for the Oracle instance. This file is usually located in the $ORACLE_HOME/dbs directory. The file is named init.ora, where SID is the value of the SID parameter for the instance.

Here is an example of how to modify the init.ora file to set the SID parameter:

*.db_name='ORCL'
*.db_unique_name='ORCL'
*.pga_aggregate_target=4096M
*.sga_target=8192M
*.processes = 500
*.sessions=555
*.license_max_sessions=666

In this example, the db_name and db_unique_name parameters specify the name of the database and the unique name for the database instance, respectively. The pga_aggregate_target and sga_target parameters specify the amount of memory allocated for the database, while the processes and sessions parameters specify the number of database processes and user sessions that can be active at any given time.

3. Verifying the SID parameter configuration

To verify that the SID parameter has been configured correctly, you can use the sqlplus command-line utility to connect to the database instance using the SID parameter. Here is an example of how to connect to the database using the SID parameter:

sqlplus sys/password@ORCL as sysdba

In this example, ORCL is the value of the SID parameter. If the connection is successful, you will see a message similar to the following:

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

4. Conclusion

In conclusion, configuring the SID parameter correctly is important for managing an Oracle 11g database effectively. By following the steps outlined in this article, you can ensure that your database instance is properly configured and performing optimally. With this knowledge, you will be able to better manage your Oracle databases and ensure their reliability and efficiency.