How to modify the listener configuration in Oracle

Oracle is a popular relational database management system that can be used to store and manage data for enterprise applications. The listener is an important component during the installation and configuration of Oracle. The listener is the communication bridge between the Oracle client and the Oracle server. It listens for requests from the Oracle server and passes them to the corresponding process. If you need to modify the listener configuration, you can follow the steps below.

1. Log in to the Oracle database

First, you need to log in to the Oracle database using an administrator account to be able to modify the listener configuration. You can use sqlplus or other management tools (such as Toad or SQL Developer) to log in to the Oracle database.

2. Check the current listener configuration

Before modifying the listener, it is best to check the current listener configuration. You can use the LSNRCTL command line tool to view the status and configuration of the listener.

Open a command line terminal and enter the LSNRCTL command. Then enter the STATUS command to view the current status of the listener. This command will display the name, version, status, listening port and other information of the listener.

3. Stop the listener

Before modifying the listener configuration, you need to stop the currently running listener. In the LSNRCTL command line tool, you can use the STOP command to stop the listener. For example, enter the "STOP LISTENER" command to stop the default listener.

4. Modify the listener configuration file

You can use a text editor to modify the listener configuration file. The listener configuration file is usually $ORACLE_HOME/network/admin/listener.ora. Open this file and find the name of the listener you want to modify.

The most common way to modify a listener configuration is to add or remove services. Services define database instances that listeners can listen on. To add a service, add the following line (where SID_LIST, SID, and SERVICE_NAME are required configuration settings):

SID_LIST_LISTENER =
(SID_LIST =

(SID_DESC =
  (SID_NAME = PLSExtProc)
  (ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_1)
  (PROGRAM = extproc)
)
(SID_DESC =
  (SID_NAME = ORCL)
  (ORACLE_HOME = /u01/app/oracle/product/12.1.0/dbhome_1)
  (GLOBAL_DBNAME = ORCL)
)

)

SERVICE_NAME_LISTENER =
(SERVICE_NAME =

(SID = ORCL)
(SERVICE_NAME = orcl)

)

After adding or removing services, save and close the listener configuration file.

5. Start the listener

After completing the modification, please use the LSNRCTL command line tool to start the listener. You can use the START command to start the listener. For example, enter the "START LISTENER" command to start the default listener.

6. Test the listener

Finally, test whether the modified listener configuration is working properly. The connection to the listener can be checked using the TNSPING command. For example, enter the "TNSPING ADWDG" command to check whether a connection is established with the listener "ADWDG".

Summary

Modifying the Oracle listener configuration is a critical operation. If configured incorrectly, enterprise applications may not work properly. This article introduces the steps to modify the Oracle listener configuration. It is recommended to back up the listener configuration file before operation to prevent any unnecessary losses.

The above is the detailed content of How to modify the listener configuration in Oracle. For more information, please follow other related articles on the PHP Chinese website!