sqlplus

[Cathy Arora]

Hi all;
I am logged on hp-unix 11:00 box and trying to
log to sqlplus. I have exports in my .profile
for ORACLE_SID ,CLASSPATH LD_LIBRARY_PATH etc
and proper Path etc
but when I type my in sqlplus id I get an error message

ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
HP-UX Error: 2: No such file or directory
Any clue what could nbe happeing.
Thanks for help.

[Vijaya Kumar_3]

i think your database is not available OR you are working with a wrong ORACLE_HOME directory.
To check your database, do a

ps -ef | grep pmon

and see your database listed.
Also check your oracle installation path. there may be multiple directories.

[Graham Cameron_1]

The error says it all.
Oracle not available.

Is the box you are logged into the same box that runs the database?

If so, check your sid (echo $ORACLE_SID), and ask the DBA ti check the database for that SID.

If not, you need to specify a database location to sqlplus (eg sqlplus myid@database)

-- Graham

[Cathy Arora]

Thanks to try to help
oracle sid is OK. pmon is running. database is up.
is it possible that id is wrong?

[Michael Schulte zur Sur]

Can you give us the output of:
set | grep -i ora
and check the alertfile, whether oracle has any problems since last startup.
Do you just execute sqlplus and then type user/password?

Michael

[Paddy_1]

Doc ID:
Note:122183.1
Subject:
ORA-27101 "Shared Memory Realm Does Not
Exist" Connecting Via Net8
Type:
PROBLEM
Status:
REVIEWED

Content Type:
TEXT/PLAIN
Creation Date:
17-OCT-2000
Last Revision Date:
29-DEC-2000
Language:
USAENG



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Problem Description
-------------------

You are attempting a client connection to an 8i database via
sqlplus and receive the following errors:

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4 Error: 2: No such file or directory

You have installed 8.1.7 on the same server in a seperate
ORACLE_HOME.

Solution Description
--------------------

1) For local (BEQ) connections:

Verify that ORACLE_SID is set and points to a valid 8.1.7
database which is up and running.

% echo $ORACLE_SID
junk

% ps -ef |grep smon
oracle 24603 1 0 15:22:51 ? 0:02 ora_smon_JUNK

In this scenario, as ORACLE_SID is case-sensitive on the Unix
platform, a database called 'junk' isn't running. The fix would
be to set ORACLE_SID correctly or to the valid instance.

% setenv ORACLE_SID JUNK

2) For remote (TCP/listener) connections:

Review the listener.ora currently used to startup the listener
and verify the ORACLE_HOME is correct for all listed 8i
databases.

If the ORACLE_HOME points to the 8.1.7 software yet the database
was created with 8.1.6 or 8.1.5, then this error can occur.


Explanation
-----------

Previously when the ORACLE_HOME or ORACLE_SID was set incorrectly,
in the 'oracle' or client user's environment, only ora-1034 was reported.

ORA-01034 "ORACLE not available"

With 8.1.7, the ora-27101 is reporting that the shared memory
key generated by the client doesn't match any currently
existing keys. This is to be expected if the ORACLE_HOME used by
the client isn't the same as the one used to startup the database
with or the ORACLE_SID is not correctly referencing the right
instance.


Additional Search Words
-----------------------

listener, tnslsnr, parameter, hashing algorithm, attach, SGA

[Hein van den Heuvel]

The shared memory id is calculated as a hash from ORACLE_HOME and ORACLE_SID. Maybe you listener.ora / tnsnames.ora do not match the environment used to start the DB?

If you can't figure it out from there, then also check that oracle has setuid (+s)

ls -l $ORACLE_HOME/bin/oracle:
-rwsr-sr-x ... oracle

chmod 7755 $ORACLE_HOME/bin/oracle

hth,
Hein.