RE: Oracle LOGMNR on Oracle RAC problem

From: Guang Mei <>
Date: Thu, 20 Mar 2008 12:21:36 -0400
Message-ID: <>

Yes, redo logs are in shared storage (called G drive), and can be seen by both nodes.  


From: John Hallas [] Sent: Thursday, March 20, 2008 12:04 PM
To: Guang Mei;
Subject: RE: Oracle LOGMNR on Oracle RAC problem  

Are the redo logs on shared storage and readable from both nodes?  


[] On Behalf Of Guang Mei Sent: 20 March 2008 15:43
Subject: Oracle LOGMNR on Oracle RAC problem  


We are attempting to capture changes made to a 2 node oracle RAC database using the log miner. The problem we are having only occurs when we are using Oracle RAC. We are successful when we do this on a non-Oracle RAC database. In all cases we believe that we have supplemental logging turned on.  

We are using JDBC and connect to the database as follows:






We are initiating the logging as follows using a JDBC connection. The connection:  


    OPTIONS => SYS.DBMS_LOGMNR.CONTINUOUS_MINE+          SYS.DBMS_LOGMNR.DICT_FROM_ONLINE_CATALOG+          SYS.DBMS_LOGMNR.COMMITTED_DATA_ONLY ) }   We then read the data using a prepared statement with a fetch size of 1 using the following query:  

SELECT SCN, COMMIT_TIMESTAMP, TABLE_NAME, SQL_REDO, CSF, OPERATION     FROM V$LOGMNR_CONTENTS     WHERE TABLE_NAME IS NOT NULL AND TABLE_NAME IN ( 'CSM_PARAMETER', 'TS_ORDER' )         AND SEG_OWNER = 'ORADEV91'         AND OPERATION IN( 'UPDATE', 'DELETE', 'INSERT' )   To test the functionality I then update the CSM_PARAMETER table from each of the hosts in the two node oracle RAC cluster.  

When I modify the data from a connection to devwin15, it appears in the result set returned by the select from v$logmnr_contents.

When I modify the data from a connection to devwin16, no entries appear in the result set.  

How can I make this work regardless of which host the connection has been made to?  

Received on Thu Mar 20 2008 - 11:21:36 CDT

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