Netlsnr Agent

The Netlsnr agent monitors the listener process. The agent controls the listener for the database. The listener is a server process that listens to incoming client connection requests and manages traffic to the database.

The Netlsnr agent brings the listener services online, monitors their status, and takes them offline. Specific agent operations include:

• Online---Starts the listener process by using the following command:

   lsnrctl start $LISTENER
• Offline---Stops the listener process by using the following command:

   lsnrctl stop $LISTENER

If the listener is configured with a password, the agent uses the password to stop the listener.

• Monitor---The Netlsnr agent provides two levels of monitoring: basic and detail. In the basic monitoring mode, the agent scans the process table for the tnslsnr process to verify the listener process is running. In the detail monitoring mode, the agent uses the command lsnrctl status $LISTENER to verify the status of the Listener process.
• Clean---Scans the process table for tnslsnr $Listener and kills it.
• Action---Performs predefined actions on a resource. See Action Entry Point for more information.