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Operating Systems Linux Problem in accessing Oracle Database Server from Linux Machine Post 302914140 by balaji kumar on Friday 22nd of August 2014 06:32:22 AM
Old 08-22-2014
Problem in accessing Oracle Database Server from Linux Machine

I am facing a strange issue in connecting to Oracle database from Linux Machine
- The connectivity is not failing all the time , the failure to success ratio is 1:70.
- Error "ORA-12545: Connect failed because target host or object does not exist"
- Majority of the time the connection is successful
- I am able to ping the target database server using the hostname defined in /etc/hosts
- There is another Oracle server which has a seamless connectivity.

Entry in tnsnames.ora
Code:
XXX.XXXXXX.COM =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = XXX.XXX.XX.XX)(PORT = XXXX))
    )
    (CONNECT_DATA =
        (SERVER = DEDICATED)
        (SERVICE_NAME = XXXX)
       (FAILOVER_MODE =
        (TYPE = SELECT)
        (METHOD = BASIC)
        (RETRIES = 180)
        (DELAY = 5)

    )))


Last edited by Franklin52; 08-22-2014 at 11:19 AM.. Reason: Please use code tags
 

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OCI_SET_CLIENT_INFO(3)													    OCI_SET_CLIENT_INFO(3)

oci_set_client_info - Sets the client information

SYNOPSIS
bool oci_set_client_info (resource $connection, string $client_info) DESCRIPTION
Sets the client information for Oracle tracing. The client information is registered with the database when the next 'roundtrip' from PHP to the database occurs, typically when an SQL statement is executed. The client information can subsequently be queried from database administration views such as V$SESSION. The value may be retained across persistent connections. PARAMETERS
o $connection -An Oracle connection identifier, returned by oci_connect(3), oci_pconnect(3), or oci_new_connect(3). o $client_info - User chosen string up to 64 bytes long. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Setting the client information <?php $c = oci_connect('hr', 'welcome', 'localhost/XE'); // Record the client information oci_set_client_info($c, 'My Application Version 2'); // Code that causes a roundtrip, for example a query: $s = oci_parse($c, 'select * from dual'); oci_execute($s); oci_fetch_all($s, $res); sleep(30); ?> // While the script is running, the administrator can see the client // information: sqlplus system/welcome SQL> select client_info from v$session; NOTES
Note Oracle version requirement This function is available when PHP is linked with Oracle Database libraries from version 10 g onwards. Tip Performance With older versions of OCI8 or the Oracle Database, the client information can be set using the Oracle DBMS_APPLICATION_INFO pack- age. This is less efficient than using oci_set_client_info(3). Caution Roundtrip Gotcha Some but not all OCI8 functions cause roundtrips. Roundtrips to the database may not occur with queries when result caching is enabled. SEE ALSO
oci_set_module_name(3), oci_set_action(3), oci_set_client_identifier(3). PHP Documentation Group OCI_SET_CLIENT_INFO(3)
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