Problems establishing a Shared Server connection

I am trying to establish a connection to a shared server on a test database. The database is 10.2.0.4 and runs on Solaris 10. Here are some setting for my init file, and I think the last two do not need to be set.
# Shared Server
dispatchers="(PROTOCOL=TCP) (SERVICE=DBA10XDB)"
shared_servers=5
shared_server_sessions=20
I connect from my client which uses a tnsnames.ora file and does NOT specify a dedicated server. Here is the result of LSNRCTL SERVICES:
LSNRCTL for Solaris: Version 10.2.0.4.0 - Production on 22-MAR-2011 10:07:04
Copyright (c) 1991, 2007, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
Services Summary...
Service "BUILDTST" has 1 instance(s).
Instance "BUILDTST", status READY, has 1 handler(s) for this service...
Handler(s):
"*DEDICATED*" established:1 refused:0 state:ready
LOCAL SERVER
Service "BUILDTST_XPT" has 1 instance(s).
Instance "BUILDTST", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:1 refused:0 state:ready
LOCAL SERVER
Service "DBA10XDB" has 1 instance(s).
Instance "BUILDTST", status READY, has 1 handler(s) for this service...
Handler(s):
"*D000*" established:0 refused:0 current:0 max:992 state:ready
DISPATCHER <machine: dbtest, pid: 20864>
(ADDRESS=(PROTOCOL=tcp)(HOST=dbtest)(PORT=50059))
The command completed successfully
V$SESSION shows the connections to be DEDICATED. Any suggestions as to what I may be doing incorrectly? Reading all I can find on this seems to indicate all I need to do is have DISPATCHERS and SHARED_SERVERS set and then connections will automatically be shared server connections.

Thanks. Your post helped me get things straightened out. After changing my tnsnames file I was getting an ORA-12520. Hmmm. I then noticed the (SERVICE=DBA10XDB) on my DISPATCHERS parameter, which was there by default when Oracle configured the init file initially. I removed that and it worked.
Then I was able to get connections to the shared server with and without the SERVER=SHARED setting. I knew I had read that Oracle will default to shared server if not specified, but your post indicated that a client connection can be forced to use the shared server, even when no dispatchers are registered. I think mine was not registered to my instance due to the (SERVICE=DBA10XDB) setting. If there are no registered dispatchers the connection request is rejected.

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Thanks for your post.... but still i have doubt on below points -
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Shared server connections.

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user8869798 wrote:
we are running a third party application with an 11g database shared server configuration and OAS 10gR2. Dispatchers set to 10 and shared servers set to 100. When the database instance is started, the 100 shared server and 10 dispatcher sessions start up and I can see these processes with ps -ef. They show as ora_s0* processes and ora_d0* respectively.
At some point after the startup of the application, it establishes a connection pool of 100 sessions (10 per dispacher). The process Id of these sessions correspond to the pids of the dispatcher processes not the shared server processes.
The 100 sessions in the connection pool remain idle until a user logs on to the system. When a successful login is made, I see that about 8 of the idle sessions become active and remain so until the user finishes with the application and logs out.
Questions :
1. Is there a query I can do to show me the shared sherver sessions i.e. ora_s0* being used?You can use v$shared_server s, v$circuit c, v$session n
with this as joining condition- s.circuit = c.circuit and c.saddr = n.saddr
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2. I need to record the number of connections being made to the system over a period and how long each user is connected for, could you suggest the best method (including queries) of going about this task?
I see only ash the option for you, else you need to have your own scheduled script/procedure that would gather that information.
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user11983096 wrote:
Hi fellows,
I am configuring dataguard from RAC primary to RAC standby. The RAC primary is using shared server mode. The primary server tnsnames.ora looks like this:
HWPR =
(DESCRIPTION =
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(CONNECT_DATA =
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(SERVICE_NAME = hwpr)
while documentation says that for dataguard dedicated server is required. so what changes do i need to do. Is it only required to changed the tnsnames.ora from shared to dedicated or any other init parameter is also required to be changed.Yes you must change in tnsnames.ora file for primary and standby side, together.

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Best Regards
GI 11.2.0.2 PSU4
RDBMS 11.2.0.1
OS AIX 6.1

EB wrote:
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Hello,
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Last edited by Hallucinogenic (2009-07-02 13:56:07)

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SQL*Plus: Release 11.2.0.1.0 Production on Mon Feb 15 21:37:35 2010
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
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SYSTEM                         [email protected] (TNS V1-V3)
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