TNSNAMES.ora and LISTENER.ora tuning

Hello!
I have a PE 8.1.7 installed.
When connecting fron SQL Navigator to Oracle DB I get an error message and sqlnet.log contains the following:
Fatal NI connect error 12538, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=myhost)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=Andrei1.domain)(CID=(PROGRAM=E:\SQL Navigator 3\sqlnav3.exe)(HOST=MYHOST)(USER=kr))))
VERSION INFORMATION:
TNS for 32-bit Windows: Version 8.1.6.0.0 - Production
Time: 30-MAR-2001 13:50:21
Tracing not turned on.
Tns error struct:
nr err code: 0
ns main err code: 12538
TNS-12538: TNS:no such protocol adapter
ns secondary err code: 12560
nt main err code: 508
TNS-00508: No such protocol adapter
nt secondary err code: 0
nt OS err code: 0
Why is it stated that TNS version is 8.1.6.0.0? Could it be that OracleOraHome81TNSListener was overwritten when I installed Designer 6i? What should I do in this case?
Configuration files are:
# TNSNAMES.ORA Network Configuration File: E:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ANDREI1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = Andrei1.domain)
GIOP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 2481))
(CONNECT_DATA =
(SERVICE_NAME = Andrei1.domain)
INST1_HTTP =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = SHARED)
(SERVICE_NAME = Andrei1.domain)
(PRESENTATION = http://admin)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
# LISTENER.ORA Network Configuration File: E:\oracle\ora81\network\admin\listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 1521))
(DESCRIPTION =
(PROTOCOL_STACK =
(PRESENTATION = GIOP)
(SESSION = RAW)
(ADDRESS = (PROTOCOL = TCP)(HOST = myhost)(PORT = 2481))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oracle\ora81)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = Andrei1.domain)
(ORACLE_HOME = E:\oracle\ora81)
(SID_NAME = Andrei1)
null

What are the wait events you are getting?
You got to be careful with SDU packet size, mostly the default is suitable for all the environments. If you increase the packet size to say 8K, you may be wasting the space if you are not able to utilizing all 8K. That would have an adverse affect as well.

Similar Messages

Listener.ora and tnsnames.ora tuning through SDU settings

Hi,
In my current environment we have lot of network wait events,when I look into the tnsnames.ora and listener.ora value for SDU is set to default(2k).
I read few documents and its telling me to increase the value to 8k-32k.I want to test how much benifit I will get If I change that values.
thanks in advance

What are the wait events you are getting?
You got to be careful with SDU packet size, mostly the default is suitable for all the environments. If you increase the packet size to say 8K, you may be wasting the space if you are not able to utilizing all 8K. That would have an adverse affect as well.

Figuring out location of tnsnames.ora and listener.ora file.

Hello.
Is there a way to figure out what my oracle instance is reading in terms of tnsnames.ora and/or listener.ora file? According to the 10g docs, they can be found in a few places:
1. $ORACLE_HOME/network/admin
2. $TNS_ADMIN
3. in a global configuration directory, on solaris it is /var/opt/oracle.
How would I know which one my instance/lsnrctl is reading, aside from checking out differences in behavior?
Plus, how would I change where to look for the file?
thanks.

On Solaris you can use 'truss' on the binary and grep for all the open() calls to see exactly which files are being used or tested for in order. I had an issue once where a tnsnames.ora was being used and it turned out to be $HOME/.tnsnames.ora (IIRC). There are similar calls under Linux (strace).

Tnsname.ora and listener.ora files in RAC environment.

Want to clear my concept regarding
tnsname.ora and listener.ora files in RAC environment. Is there any good notes on Metalink for that?

Check this metalink note, it covers specific RAC issues:
Configuration of Load Balancing and Transparent Application Failover
Note:226880.1
Werner

Trouble with listener.ora and tnsnames.ora

I can't get the listener running.
Trying to start the listener results in the following message:
LSNRCTL for MacOS X Server: Version 9.2.0.1.0 - Beta on 04-JAN-2003 23:35:28
Copyright (c) 1991, 2002, Oracle Corporation. All rights reserved.
Message 1070 not found; No message file for product=network, facility=TNSTNS-12545: Message 12545 not found; No message file for product=network, facility=TNS
TNS-12560: Message 12560 not found; No message file for product=network, facility=TNS
I suspect i have a configuration error in listener.ora or tnsnames.ora, but I'm stumped at this point.
Can anyone help?
Much appreciated.
John freberg
TNS-00515: Message 515 not found; No message file for product=network, facility=TNS
MacOS X Server Error: 2: No such file or directory

Assume you've got $ORACLE_HOME
We'd end run listener problems by setting/exporting TNS_ADMIN and putting tnsnames.ora and listener.ora files in a standard place ( ../dbs for our site) rather than Oracle's defaults.
We'd also found that there is a parsing problem of the tnsnames.ora file by 9.2 ( its in AIX and MAC versions at least). Placing the entire description section on a single line consistently resolved problem.
Opening a Tar on that one.
So Now we're accessing Dbs based on mac and AIX from Multiple MAC and AIX remote sites with SQLPLUS and thin clients.
JD

Automatic renaming hostname in tnsnames and listener.ora

Is it realy not possible to change hostname automaticly in TNSNAMES.ORA and LISTENER.ORA after installing an image-CD with Windows XP and Oracle11GR1. In Windows , there is a SID Change Tool and in Oracle?
Thank's for your help !
René

Again, take a look at running "netca /silent ..." with a response file.
Another (perhaps better) option would be to burn a cd with a software only install and that upon "activation" would then run a dbca noninteractive session to configure a database (I assume you want one, mentioning listener.ora).

How to write the listener.ora and tnsnames.ora

Hi, there
I store my oracle database in the machine A. In the machine B,
it only install the oracle without create database. How should
I write the
listener.ora and tnsnames.ora? So that the machine B could
acces the database which store in the machines A.
Could you give me a simple example and with some description.
Thanks you very much!!
null

wrjih (guest) wrote:
: Hi, there
: I store my oracle database in the machine A. In the machine B,
: it only install the oracle without create database. How should
: I write the
: listener.ora and tnsnames.ora? So that the machine B could
: acces the database which store in the machines A.
: Could you give me a simple example and with some description.
: Thanks you very much!!
1 - you can simply copy the files from the server to the client.
If they are correct, it must work fine
2 - Follow the examples inside the
$ORACLE_HOME/network/admin/samples
3 - Follow my examples:
I will try to make it simple:
The server must have the listener.ora. The client does not need
it if you don't have a database there.
I cannot tell you what is mandatory in the file, and what is not.
The listener.ora has the interface (addr or name)
to listen, the port/proto, and some info about your database
($ORACLE_HOME and Name).
#--- Listener.ora -- my minimal settings ---
LISTENER =
(ADDRESS_LIST =
(ADDRESS=(PROTOCOL= TCP)(Host=Server)(Port= 1521))
(ADDRESS=(PROTOCOL= IPC)(KEY = ORCL))
STARTUP_WAIT_TIME_LISTENER = 1
CONNECT_TIMEOUT_LISTENER = 10
TRACE_LEVEL_LISTENER = OFF
TRACE_LEVEL_CLIENT=OFF
SID_LIST_LISTENER =
(SID_LIST=(SID_DESC=
(SID_NAME = SACS)
(ORACLE_HOME=/oracle/805)))
#---- end of listener.ora ---
Both machines can, and should have similar TNSNAMES.ORA:
tnsnames.ora has the address or name of the server, and the Name
of the database you wish to connect to.
#--- tnsnames.ora --- minimal.
ORCL = (DESCRIPTION =
(ADDRESS_LIST=(ADDRESS = (PROTOCOL = TCP)(Host=Server)(Port =
1521)))
(CONNECT_DATA = (SID = SACS)))
#--- end of tnsnames.ora ---
And finally sqlnet.ora, that is very usefull for setting secure
networks or
just logging for looking for errors. You can also set your
keepalive timeout.
#--- sqlnet.ora
TRACE_LEVEL_CLIENT = OFF
names.directory_path = (TNSNAMES)
SQLNET.EXPIRE_TIME = 10
#-- end of sqlnet.ora --
null

What should have in equal tnsnames,ora and listener.ora?

Hi forum members again I'm very new in oracle, and I'm trying to create a sucessfull net service name, using oracle net configuration assitant, but when I try to test it I got this error, .***"""ORA-12514: TNS:listener does not currently know of service requested in connect descriptor."""*** And I have read that tnsnames.ora and listener.ora should have some parameters in common, but exactly I don't know, Do you know what parameters should be? or The ORA-12514 problem , doesn't have relation with the tnsnames.ora and listener files?, If doesn't wich is the reason of this message?
By the way I put what contain these files:
---------------------------------------------------------------------------listener.ora
# listener.ora Network Configuration File: /opt/oracle/product/10.1.0.3/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = oracle.gentoo)
(ORACLE_HOME = /opt/oracle/product/10.1.0.3)
(SID_NAME = oracle)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
SAVE_CONFIG_ON_STOP_LISTENER = TRUE
TRACE_LEVEL_LISTENER = USER
/////////////////////////////////////////////////////////////////////////////tnsnames.ora
# tnsnames.ora Network Configuration File: /opt/oracle/product/10.1.0.3/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
NORACLE =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = tux)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = noracle)
By the way what must be the username and the pasword that ask the ORACLE CONFIGURATION ASSINTANT to test the net service name? Must be the user name and password of the system user?
Thanks in advance

OK, here we go ... extra long as I intend to bookmark this and make reference, as this is a very common question ... skip to the bottom if you want my guess to the solution.
Oracle Net Services (formerly SQL*Net, Net8, Oracle Networking) has two parts - the client and the server side. I'll discuss the server first, then the client.
1) Server, and specifically Listener:
The Oracle Listener is a monitor that listens for Oracle service requests on one or more ports. Usually this is on TCP/IP port 1521. When it gets an Oracle request from any network client, it checks whether it's in the list of Oracle Services for which it is monitoring. If found, it will contact that service, request a connection for the client, tell the service and client where and how to connect, and get itself out of the loop.
Notes:
a) It can listen on behalf of any number of services;
b) A service can be a database instance, an EPG service (the DBMS_EPG is the replacement for Apache in the database in 10gR2), an external job, etc;
c) One listener can listen on behalf of multiple database instances;
d) The services can be listed in the LISTENER.ORA or they can self-register;
e) If databases self-register, they use the initialization parameter LOCAL_LISTENER
f) If self-registering, the listener should be up before the database
g) Shutting down the listener will stop future connections, but has no impact on existing ones.
One frequent point of confusion - a connection request on the local machine may loop out to the network and contact the listener, or it may bypass the listener entirely and use a bequeath adapter. The 'beq' connection is the 'normal' connection by "sqlplus / as sysdba" or "sqlplus system/manager" on the local machine (note that no @instance was used ... in *nix, that is derived from the $ORACLE_SID environment variable)
In your listener.ora, you specify global_dbname=oracle.gentoo and sid_name=oracle. I assume therefore you can find an initoracle.ora or spfileoracle.ora somewhere on your system.
2) Client:
A client that wants to connect to an Oracle service uses the client side of the Oracle Net Services. The definition of client includes: any Oracle client utiltiy (SQLPlus, SQLLoad, Forms, Reports, etc.); an Oracle database instance that wants to make a external procedure call or a dblink; third party tools such as ODBC and JDBC.
In SQL*Net version 1 the connection was made by specifying the target in the connect string ("user/password@host:listener_port:sid") and that is also used these days by many JDBC drivers, especially the Oracle Thin JDBC driver. Oracle's Easy connection mechanism uses a similar variant.
Since SQL*Net Version 2, Oracle has supported the concept of alias translation. Basically it's very similar in concept to DNS - give it the name of the service and tell it where to find the translation table. The translation tables include TNSNAMES.ORA, ONAMES servers (deprecated in 10g), LDAP usng Oracle's OiD. The choice of translation table, and alternate order if the lookup fails in one, is stored in the SQLNET.ORA (if one exists).
Assuming TNSNAMES.ORA, the chain of events is:
- get the alias to look up (in your case NORACLE);
- if the SQLNET.ORA has a DEFAULT_DOMAIN setting, (often =WORLD) append a dot and that value to the alias;
- go to the TNANSMES.ORA file pointed by the TNS_ADMIN variable (environment or registry), or (if not set) the one in the $ORACLE_HOME/network/admin directory;
- look up the first occurance of the alias;
- if found, use the protocol specified to request a connection to the host, usin DNS to unravel the host to an IP address if necessary (in your case TCP/IP, to TUX) ;
- if host connection if made, connect to the listener that is configured for that port (in your case 1521);
- if listener is there, ask it for connection to the service (in your case, you are asking for instance 'noracle');
i if the listener knowwss about the service, it will hand off the request.
Your problem appears to be asking for instance 'noracle' in the tnsnames but listeneing for 'oracle' at the listener. Of course, I can not see any auto-registered instances which you would get from "lsnrctl status" on the server.

Best Practices: tnsnames.ora and listener.ora

I would like to know if it is better to use the public ip / public hostname or the virtual ip / virtual hostname in the tnsnames.ora and listener.ora files on the servers and clients. I have seen examples where the vip is used for all areas, and I have seen examples where the public has been used in all areas. And of course even some examples where both are used. It makes more sense to me to use the vip, as that is what is failed over But what is the public ip used for if all connections are made to the vip?
Thanks

Database version: 10.2.0.4
Server OS: Red Hat Linux Enterprise 4.6 (RHEL4)
Oracle Rac configuration: 4 node cluster.
host file:
10.1.1.50 rac1.somcompany.com rac1priv # RAC1
10.1.1.51 rac2.somcompany.com rac2priv # RAC2
10.1.1.52 rac3.somcompany.com rac3priv # RAC3
10.1.1.53 rac4.somcompany.com rac4priv # RAC4
172.16.71.50 rac1.somcompany.com rac1pub # RAC1
172.16.71.51 rac2.somcompany.com rac2pub # RAC2
172.16.71.52 rac3.somcompany.com rac3pub # RAC3
172.16.71.53 rac3.somcompany.com rac4pub # RAC4
172.16.72.50 rac1.somcompany.com rac1vip # RAC1
172.16.72.51 rac2.somcompany.com rac2vip # RAC2
172.16.72.52 rac3.somcompany.com rac3vip # RAC3
172.16.72.53 rac3.somcompany.com rac4vip # RAC4
So if I was to create a tnsnames files on the servers, would I use the vip information as the host or the public information?
Would I use the same tnsnames files for the clients?
Would I use the vip or public address in the listener files?
Thanks

Tnsnames.ora and listener.ora

I am studying oracle and came accross
tnsnames.ora and listener.ora file.
Can any one tell me in simplified terms about these 2 files. what are they and what exactly they do?

When you are accessing Oracle over network you need a listerner service (usually on server box) and SQLNet or Net8 client on client machine. Listener.ora specifies the parameters for listener process and tnsnames.ora contains the SQLNet or Net8 connection informations about database server(s)

Tnsnames.ora and listener.ora dissappearing

We are ruinning oracle 9.2.0.6.0 on Solaris 9 on a Sun-Fire-440.
We are having an issue where the above mentioned files (tnsnames.ora and listener.ora) keep dissappearing on this box.
We cannot seem to find anything in the unix logfiles or oracle log files, has anybody got any ideas on what could be causing this?
Mark Stewart.

If the files are being deleted then the timestamp on the directory which contains them will be updated ( given by ls -l ) . this would enable one to find out the time when they were deleted ( as long as nothing else in the same directory is being changed ) . It would be interesting to see if the deletes always happen at the same time , which would imply some automatic process , perhaps running under cron.

Oracle 10g I don't have the files listener.ora, tnsnames.ora and sql.ora

Hi folks,
I uninstalled my Oracle 10g and when I re installed I got success, but when I went to the folder \network\admin didn't have the files listener.ora, tnsnames.ora and sql.ora. I have been trying during more than one month start my listener only because I need access the Oracle database from my Java application and I got the message:
java.sql.SQLException: Io exception: The Network Adapter could not establish the connection
As additional information, I got no problem to access the SQL*Plus.
=======================
C:\>lsnrctl status
LSNRCTL for 32-bit Windows: Version 10.1.0.2.0 - Production on 18-APR-2006 10:53
:58
Copyright (c) 1991, 2004, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
32-bit Windows Error: 61: Unknown error
====================
C:\>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Ethernet adapter Wireless Network Connection 2:
Connection-specific DNS Suffix . : myhome.westell.com
IP Address. . . . . . . . . . . . : 192.168.0.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
Thanks in advance.

Thanks ALL, I GOT IT, but I used other solution.
Since I installed and uninstalled the Oracle several times, it keeps also many different Services for the listener. I don't know why, it didn't create a Service for my actual instalation with its path. In other words, all the services remained in the services.msc panel, had the path that was already removed from the Windows folder.
Then what I did, was that I picked one service, took its name (OracleOraDb10g_home1TNSListener), went to regedit to [HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\OracleOraDb10g_home1TNSListener] and simply changed the image path that was setted for the one that was removed (C:\oracle\product\10.1.0\Db_2\BIN\TNSLSNR ) for mine that is installed right now
(C:\oracle\product\10.1.0\Db_1\BIN\TNSLSNR). Nothing more and finally works.
I have tried something in the services.msc panel before, as you can see in this forum at the thread "I can't start listener in the Control Painel/Admin Tools/ Services", but I never got
success.
Appreciate your time!!

ORA-12505 error after setup tnsnames and listener properly.

Hello.
I'm having a very common issue. I can't connect using tnsnames on Windows 2003 server.
Facts.
1 - Tnsnames.ora file is properly set.
2 - Listener.ora file is properly set.
3 - tnsping works with no issues.
4 - Windows service is up and running.
However, I'm getting this error.
C:\Documents and Settings\sabreadm>sqlplus lps/first1@lm3dprd1
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Jun 24 12:32:26 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
ERROR:
ORA-12505: TNS:listener does not currently know of SID given in connect
descriptor
Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied
listener.ora file content
# listener.ora Network Configuration File: D:\Apps\oracle\network\admin\listener.ora
# Generated by Oracle configuration tools.
TRACE_LEVEL_LISTENER = USER
TRACE_DIRECTORY_LISTENER = D:\Apps\oracle\NETWORK\ADMIN
LOG_FILE_LISTENER = listener.log
LOG_DIRECTORY_LISTENER = D:\Apps\oracle\NETWORK\ADMIN
TRACE_FILE_LISTENER = listener.trc
MAX_REG_CONNECTIONS_LISTENER = 3000
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.58.44)(PORT = 1521))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = lm3dtst1)
(ORACLE_HOME = D:\Apps\oracle)
(SID_DESC =
(SID_NAME = lm3dprd1)
(ORACLE_HOME = D:\Apps\oracle)
tnsnames.ora file content.
# tnsnames.ora Network Configuration File: D:\Apps\oracle\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
lm3dtst1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(Host = 192.168.58.44)
(Port = 1521)
(CONNECT_DATA =
(SID = lm3dtst1
(GLOBAL_NAME = lm3dtst1)
lm3dprd1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(PROTOCOL = TCP)
(Host = 192.168.58.44)
(Port = 1521)
(CONNECT_DATA =
(SID = lm3dprd1
(GLOBAL_NAME = lm3dprd1)
Any advice will be highly appreciated.
Thanks.
Alex.

Alex,
Next time when you post code or output or any configuration, enclose them between \ tags to preserve formatting
Your code or output \h4. Anyway, modify your tnsnames.ora file on your client machine and add this lm3dprd1 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.58.44)(PORT = 1521))
(CONNECT_DATA =
(SERVER = dedicated)
(SERVICE_NAME = lm3dprd1)
(INSTANCE_NAME=lm3dprd1)
Regards
OrionNet

Listener.ora and tnsnames.ora and sqlnet.ora

Hello newbie here, trying to look into simple RAC setup with 2 nodes (A.this.com, B.this.com), one service (PROD.this.com), one listener and one instance on each node (listener PRODlist1 using instance PRODinstance1 on node A, listener PRODlist2 using instance PRODinstance2 on node B), one database (ORCL).
db global db name = orcl.this.com
I would like loadbalancing=on, with TAF basic (no preconnect, retries 10, delay 5.)
With dynamic service registration.
What should the tnsnames.ora and listener.ora and sqlnet.ora look like?
Have read all sorts of literature, getting confused...

I post my sample configuration here:
DBA1.WORLD =
(DESCRIPTION =
(ADDRESS_LIST =
(FAILOVER=ON)
(LOAD_BALANCE=ON)
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.1)(PORT = 1521))
(CONNECT_DATA =
(BACKUP=DBA2)
(SERVICE_NAME = DBA.WORLD)
DBA2.WORLD =
(DESCRIPTION =
(ADDRESS_LIST =
(FAILOVER=ON)
(LOAD_BALANCE=ON)
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.2)(PORT = 1521))
(CONNECT_DATA =
(BACKUP=DBA1)
(SERVICE_NAME = DBA.WORLD)
)

Listener.ora and Tnsnames.ora created in a different location

Hi All,
I have both the files i.e Listener.ora and Tnsnames.Ora in a location called D:\OraHome_1 and not in D:\OraHome_1\Network\Admin !! Also I do not have the sqlnet.ora file in either of these two locations.
Though conn sys/pswd@sid is working fine and DB is also up and running, "conn / as sysdba" is not working. I would like to restore these files in their actual location and make "conn / as sysdba also working".
Thanks in advance
-Aditi

Is perhaps TNS_ADMIN set to d:\orahome_1 ?where do i check this parameter ?
What does output of following tell youc:\> tnsping sid
C:\WINNT\system32>tnsping sid
TNS Ping Utility for 32-bit Windows: Version 10.2.0.1.0 - Production on 05-JUL-2006 19:17:26
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 'complete host name')(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = SID)))
OK (30 msec)
***NOTE*** this leaves a blank space when it says 'Used parameter files:' Isn't this unusual ....!!
You may not need the listener.ora - it is kinda "optional". Not sqlnet.ora either. There are defaults to survive on.That's fine but I still would like to know why these files got created in a directory different from oraclehome\network\admin?

TNSNAMES.ora and LISTENER.ora tuning

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