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Options to log at the DB tier

Posted on 2011-02-22
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Last Modified: 2012-05-11
Hi - We have an application which has a portion of its processing done in the database - the processing is done using PL/SQL and shell scripts and currently logging occurs by writing to a flat file - however we are looking to exert more control over the logging by setting logging levels and turning logging on and off dynamically at runtime.

Can anyone suggest options for DB tier level logging - the database we are using is Oracle 11g.

Thanks
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Question by:abuyusuf
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Expert Comment

by:sdstuber
ID: 34952736
If you are familiar with java and the log4j  framework,  there is a similar structure

log4plsql  you might want to explore


http://log4plsql.sourceforge.net/
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Expert Comment

by:sdstuber
ID: 34952761
another good option is the Instrumentation Library for Oracle, orginally from HOTSOS

http://sourceforge.net/projects/ilo/
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sdstuber earned 1500 total points
ID: 34952803
and of course, you can always roll your own.

use autonomous_transactions to commit your logs independently of the transactions that spawned them (one of the few places autonomous transactions are appropriate to use)

Here is a simple logging procedure you expand on as needed
FUNCTION write_to_log (p_message VARCHAR2)
        RETURN NUMBER
    IS
/*
    Declaring with the Autonomous Transaction PRAGMA allows
    this procedure to commit and rollback independently of
    any parent transactions.

    i.e. The COMMIT in this procedure will only commit the
    insert statement of this procedure.  Actions outside of this
    procedure will not be committed or rolledback because of
    activity within this procedure.

    CREATE TABLE MY_LOG
    (
        LOG_TS    TIMESTAMP(6) WITH TIME ZONE,
        LOG_TEXT  VARCHAR2(4000 BYTE)
    )



*/
        PRAGMA AUTONOMOUS_TRANSACTION;
    BEGIN
        INSERT INTO my_log
                    (log_ts, log_text
                    )
             VALUES (SYSTIMESTAMP, p_message
                    );

        COMMIT;
        RETURN 0;
    EXCEPTION
        WHEN OTHERS
        THEN
            ROLLBACK;
            RETURN SQLCODE;
    END write_to_log;

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Author Closing Comment

by:abuyusuf
ID: 35324127
It only partially answers my question
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LVL 74

Expert Comment

by:sdstuber
ID: 35324394
please rescore...you didn't ask for more information.
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