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Tracking Database Links [message #392382] Tue, 17 March 2009 13:31 Go to next message
Ivancleber da Silva Neves
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Registered: July 2002
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How can I track if a database link is being used or not ? Is there a way to audit when a statement references a database link ? Any other way ? How could I do that ?

Thanks in advance

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Re: Tracking Database Links [message #392383 is a reply to message #392382] Tue, 17 March 2009 13:42 Go to previous messageGo to next message
Mahesh Rajendran
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http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/ds_concepts.htm#sthref3975
You can only audit the sql which might use the database link.

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Re: Tracking Database Links [message #392388 is a reply to message #392383] Tue, 17 March 2009 14:07 Go to previous messageGo to next message
Ivancleber da Silva Neves
Messages: 74
Registered: July 2002
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Let me explain my need. I have several database links created im my instance ( almost 300 ). Most of them are no longer used. I just want to find out what are still referenced in select statments and drop the other ones. I don´t need to audit the objets in the target instance. I just want to know if the link is still being used. There must be a way of doing this. Any ideia ? DDL trigger ? Could I track DML statmens and seek for "@" in the text ?

Thanks in advance

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Re: Tracking Database Links [message #392389 is a reply to message #392388] Tue, 17 March 2009 14:20 Go to previous messageGo to next message
Mahesh Rajendran
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That is what the docs said.
You cannot audit the usage of db link.
You can only audit the creation/Drop of a db link.
All you can do is, audit all the sql statements (select/udpdate/...) and look for usage of '@'.

It could be very expensive.

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Re: Tracking Database Links [message #392390 is a reply to message #392388] Tue, 17 March 2009 14:26 Go to previous messageGo to next message
Michel Cadot
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You can also drop them and see what are the problems.

Regards
Michel

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Re: Tracking Database Links [message #392393 is a reply to message #392389] Tue, 17 March 2009 14:41 Go to previous messageGo to next message
Ivancleber da Silva Neves
Messages: 74
Registered: July 2002
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Can i put in memory the table where the audited statment are written to be less expensive ?

Thanks a lot

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Re: Tracking Database Links [message #392394 is a reply to message #392393] Tue, 17 March 2009 14:44 Go to previous message
Mahesh Rajendran
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It is auditing that is expensive, If it is done the way you want.
Does not matter where the records are written.

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