RE: Lite: Redo sequence poll

John,

alter session set events 'immediate trace name ADJUST_SCN level 1' bumps the current SCN By one billion. I have used this event once while recovering a Tera Byte database where LGWR crashed and all the data files were inconsistent.

And also there is an undocumented paramter something like _Max_Giga_SCN which starts (!!) the SCN at higher values. Have anyone used that?

Best Regards,
K Gopalakrishnan
Bangalore, INDIA

-----Original Message-----
Kanagaraj
Sent: Tuesday, March 12, 2002 3:00 PM
To: Multiple recipients of list ORACLE-L

> I think you can **artificially** force a database to reach the SCN to
> 0xfffffff.ffff by using the event ADJUST_SCN.
> This bumps the SCN to one billion if set at level 1. So
> running them in a
> loop will bump the SCN to the max value.
> THis event generally used to bump the SCNs if there is a
> mismatch between
> file headers which is signaled by
> ORA-00600 [2662].
>
> Any volunteers?

Gopal - how do you set or access this event?

Volunteers: Just a word of warning - if you want to implement this on a Dev/Test database, make sure that it is not connected as a source or target to ANY other database via DBLinks. Otherwise you will find that these high SCNs migrate across to all others as if it were a cold virus. Such a database has to be absolutely quarantined...

John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: K Gopalakrishnan
  INET: kaygopal_at_yahoo.com

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