Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Multiple Listeners

RE: Multiple Listeners

From: Stephen Lee <>
Date: Wed, 16 Oct 2002 13:19:26 -0800
Message-ID: <>

> -----Original Message-----
> but
> even Oracle will tell you that running multiple listeners is
> worse than
> foolish.:)
> Trust me, you only need one version of the Listener up.

>From O'Reilly's "Oracle Net8 Configuration and Troubleshooting" book, pages
70 - 71, under the sub-topic "Why Use Multiple Listeners?":

Even though one listener may be all you need, there are some management advantages to using more than one: redundancy and separation of environments.

Two listeners can be used to provide redundancy in case one fails. .... Such a configuration not only protects you from the failure of one listener, it also enables you to more easily make changes that require a listener to be restarted. ...

Separation of environments is another reason to use multiple listeners. If you have two databases running on a server, you may not want any part of those two database environments intertwined. That way, if you need to restart the listener for one database, you don't affect users of the other. ...

End of quote.

I might add, if you have multiple versions of Oracle running on a box and need to patch a version in such a way that requires a complete relinking of that version, you can stop only the processes associated with that version.

The decision to run multiple listeners was not my decision to make here. But having worked in this environment for a while, I can say that it has never been a problem.

Please see the official ORACLE-L FAQ:
Author: Stephen Lee

Fat City Network Services    -- 858-538-5051
San Diego, California        -- Mailing list and web hosting services
To REMOVE yourself from this mailing list, send an E-Mail message
to: (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
Received on Wed Oct 16 2002 - 16:19:26 CDT

Original text of this message