RE: re SHUTDOWN ABORT -- was RE: Debate on rc commands Solaris and

I totally agree................

I am witness of one of these untested combination resulting in "true disaster" .

And the combination was shutdown immediate to an extremely busy database (with no response), followed by shutdown abort and all the data files got corrupted. We could not recover that big production database from that corruption of all the datafiles and we had to go back to Old and valid set of backup. That was Oracle 7.3.4 running telecom database around a year back.

Sine then I am too shaky on using shutdown abort, I avoid it unless it is as extreme urgency and if at all I have to use it, I never do it after shutdown immediate !!!!

Just my 2 cents,
Rajesh

-----Original Message-----
Sent: Monday, February 03, 2003 12:49 PM To: Multiple recipients of list ORACLE-L

I have to say that I still have an emotional response to 'shutdown abort', despite knowing that logically it ought to be perfectly safe.

The reason for this is the lack of stress testing that goes on at Oracle Corp. In most (if not all) cases, the only blanket stress test that the software gets is from production end-users.

How many millions of times per day is the message passing mechanism for parallel
query tested ? And it still has bugs.

How many times per day is shutdown abort tested - how many possible combinations of events coinciding with a shutdown abort have not yet received a single test ?

I find it very hard to shake the feeling that somewhere there is a code path that will eventually result in a big problem for someone once they switch to a regular shutdown abort.

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

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-----Original Message-----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: 02 February 2003 10:09
Solaris and

>Alter system checkpoint... You don't say...
>
>Hey, this is the first time this thread has concluded without the
>usual "you guys better watch out b/c yer gonna break your database!"
>post.
>
>I'd say this universal support for ABORT over IMMEDIATE represents a
>dramatic change in the prevailing DBA attitude over, say, two years
>ago.
>
>How do you suppose that happened?
>
>:-)
>
>The only dissenter was Dan. Dan, what's the difference between a
>kernel transaction and a regular transaction? Are you talking about
>the O/S kernel or Oracle? Can you explain in more detail what the
>kernel transaction does to make Oracle unrecoverable after ABORT?
>
>I'm still mulling over that 'alter system checkpoint.' Sounds
>familiar.
>
>--
>Jeremiah Wilton
>http://www.speakeasy.net/~jwilton
>

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