RE: Simple listener parameter question
- From: "Bobak, Mark" <Mark.Bobak@xxxxxxxxxxxx>
- To: Dan Norris <dannorris@xxxxxxxxxxxxx>
- Date: Sat, 6 Dec 2008 08:30:15 -0500
Dan,
I think you may be confusing local_listener with the listener definition in the
listener.ora. The original poster's question was about the value of the
local_listener parameter. local_listener should be set to match the currently
defined listener on the local host. If you want to alter what address the
listener listens on, you need to edit listener.ora and bounce the listener, and
then update the local_listener parameter to the corresponding value.
-Mark
________________________________________
From: Dan Norris [dannorris@xxxxxxxxxxxxx]
Sent: Saturday, December 06, 2008 3:41 AM
To: Bobak, Mark
Cc: sxmte@xxxxxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Subject: Re: Simple listener parameter question
I agree on the RAC point--it should be the VIP name/address in a RAC cluster. I
also agree that in most cases for single-instance database servers you can
safely leave it unset. However, I think setting it to HOST=localhost may only
allow connections from the database server itself since it would cause the
listener to listen on 127.0.0.1 and *not* on other IP addresses (like the
"real" IP address of the host). I can't easily test this right now, but I'm
pretty sure it's correct for current versions. It will also and almost always
be affected by whether or not you specify (IP=FIRST) in the ADDRESS section as
well. Have a look at ML 421305.1 for some really good and relevant information
related to your question.
It is also valid syntax to use (HOST=) and that will also cause the listener to
invoke default behavior and listen on the IP address that corresponds to the
hostname of the server it is running on (or possibly on
0.0.0.0<http://0.0.0.0>, which is synonymous with all IP addresses on the node).
Dan
On Fri, Dec 5, 2008 at 8:40 PM, Bobak, Mark
<Mark.Bobak@xxxxxxxxxxxx<mailto:Mark.Bobak@xxxxxxxxxxxx>> wrote:
Hi Maureen,
One reason I can think of to not use the definition you've specified, is RAC.
In the RAC environment, you'll want to specify a VIP address for the local
listener. Other than that, if you're not on RAC, leave local_listener unset,
and it will default to port 1521 on the localhost.
Hope that helps,
-Mark
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx<mailto:oracle-l-bounce@xxxxxxxxxxxxx>
[oracle-l-bounce@xxxxxxxxxxxxx<mailto:oracle-l-bounce@xxxxxxxxxxxxx>] On Behalf
Of Maureen English [sxmte@xxxxxxxxxxxxxxxx<mailto:sxmte@xxxxxxxxxxxxxxxx>]
Sent: Saturday, December 06, 2008 1:16 AM
To: oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>
Subject: Simple listener parameter question
Hi,
For those of you who have a LISTENER running on the same machine
as your database(s), do you configure the local_listener parameter
to have the actual host name, or localhost? Does anyone know of
any reason not to use something like
local_listener='(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1234))'
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