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Thread: Connecting to oracle

  1. #1
    Join Date
    Aug 2002
    Posts
    5

    Connecting to oracle

    The following message is diaplayed when i am connecting to Oracle on Sun Solaris 5.8 , Oracle 8.1.6 .
    It connects sometimes and when you come out and try again it displays the same error message shown below.
    The Oracle env variables like ORACLE_HOME , TNS_ADMIN , NLS_LANG etc... have been set before.
    Can somebody tell me why it is behaving like this.

    [eco4]-/u01/oracle/product/8.1.6/network/admin> sqlplus dd/dd

    SQL*Plus: Release 8.1.6.0.0 - Production on Mon Jan 6 20:06:18 2003

    (c) Copyright 1999 Oracle Corporation. All rights reserved.

    ERROR:
    ORA-12500: TNS:listener failed to start a dedicated server process


    Enter user-name:


    Thanks in advance
    Sridhar

  2. #2
    Join Date
    Nov 2000
    Location
    greenwich.ct.us
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    9,092
    I have seen this error when there are resource (memory) issues on the server.
    Jeff Hunter

  3. #3
    Join Date
    Jan 2002
    Location
    Canada
    Posts
    195
    Your server may have been set as 'shared process' but your client tries to use (SERVER = DEDICATED) in tnsnames.ora.

  4. #4
    Join Date
    Feb 2001
    Location
    UAE
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    304
    Did you try restarting the listener?
    Agasimani
    OCP(10g/9i/8i/8)

  5. #5
    Join Date
    Mar 2002
    Location
    Manchester, England
    Posts
    202
    This can be seen if there is a resource issue (as someone else has said) I've check the number of sessions in v$session as it sounds like oracle cant get the resources it needs for the session. Have a search for TNS-12500 on metalink.

  6. #6
    Join Date
    Dec 2002
    Location
    USA
    Posts
    53
    I believe it is a bug in 8.1.6. If you set database in dedicated server rather than MTS, the problem disappear.

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