oracle closes service

Oracle database is a very common enterprise-level database. During use, the database service may need to be shut down due to various reasons. This article will focus on how to shut down the Oracle database service and what to pay attention to.

1. Shut down the Oracle database service

1. Use the SQL*Plus command to shut down

SQL*Plus is a command line tool that comes with the Oracle database. Open the command line with administrator privileges, enter the following command to shut down the database service:

sqlplus / as sysdba

Enter the user name and password to log in, and then enter the following command to shut down the database service:

shutdown immediate;

After executing this command, Oracle The database service is shut down immediately and all running sessions are ended. If some processes cannot end normally, you can use the following command to forcefully close the database:

shutdown abort;

This operation will immediately shut down the database service and may also cause data loss, so it should be used with caution.

2. Close using Oracle Enterprise Manager

Oracle Enterprise Manager is a graphical management tool through which multiple Oracle database instances can be managed. After opening Oracle Enterprise Manager, select the database instance that needs to be shut down and click the "Stop" button to shut down the database service.

2. Precautions

1. Back up data before closing

Before closing the Oracle database service, you should back up the data in the database to avoid data loss. . Backup can be done using a data transfer tool such as Data Pump or an operating system level backup tool.

2. Check connections before closing

Before closing the Oracle database service, you should check all processes and sessions connected to the database to avoid data inconsistency. You can use the following command to check the current database connection:

select * from v$session;

If there is an unended session, you should let it end first and then close the database.

3. Check the log after shutting down

After shutting down the Oracle database service, you should check the log file of the database in order to find and solve the problem in time. You can use the following command to view the log file:

select * from v$log;

4. Stop user operations before closing

Before closing the Oracle database service, all user operations should be stopped to avoid data inconsistency. . You can use the following command to query the operations being performed:

select * from v$session_longops;

5. Stop jobs before shutting down

Before shutting down the Oracle database service, you should also stop all executing jobs to avoid Impact service shutdown. You can use the following command to query the jobs being executed:

select * from dba_jobs_running;

If there are jobs being executed, you should stop the jobs first and then shut down the database service.

In short, shutting down the Oracle database service is a complex and sensitive task. It requires full preparation in backing up data, disconnecting, terminating operations, stopping jobs, and checking logs to avoid data loss. and unnecessary trouble.

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