RE: off the wall ideas welcomed
- From: "Michael Fontana" <mfontana@xxxxxxxxxxx>
- To: <niall.litchfield@xxxxxxxxx>, <dbvision@xxxxxxxxxxxx>
- Date: Fri, 6 Feb 2009 10:50:21 -0600 (CST)
Niall,
Thanks for posting back. This is the type of thing I'd like to see others
do, to bring closure to posted issues..
This is a great back pocket reference fix I am sure will come up again and
maybe even again and again..
_____
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Niall Litchfield
Sent: Friday, February 06, 2009 10:29 AM
To: dbvision@xxxxxxxxxxxx
Cc: ORACLE-L
Subject: Re: off the wall ideas welcomed
I thought I'd post back an update on this, and yep blog it as well.
Nuno looks to be correct that this was a lob that was subject to updates.
The fact that this table turned out to have files with .mov, .mpg and .avi
extensions as well as .htm was a wee bit interesting too.
anyway, export/import did not resolve the issue when more space was
procured. This confirmed to me that the issue was with corrupt data - in
addition dbv showed that
a) there was only one page affected "in flux"
b) it was different from the block pre drop/recreate
I then took a block dump of the affected block and got a row listing
including just a single row from my table back. There was an update
transaction in the ITL slots as well, pretty much along with Nuno's
comments about updates on his blog. I then determined which row we were
talking about, deleted the row, and took a second block dump of the same
block to confirm that it was now empty of data. finally I reran dbv again
and this time the file came up clean.
thanks for all the kind suggestions - it's a shame that this database is
not 10g and block checking & recovery is unavailable.
Niall
On Thu, Feb 5, 2009 at 10:30 AM, Nuno Souto <dbvision@xxxxxxxxxxxx> wrote:
Niall Litchfield wrote,on my timestamp of 5/02/2009 2:04 AM:
I'm pretty much out of (cheap) ideas for dealing with this
corruption right now, so would welcome some.
What is the output of this:
select dbms_metadata.get_ddl('TABLE','<table_name>') from dual;
Also, some ideas on what to look for and where things are, here:
http://dbasrus.blogspot.com/2007_02_01_archive.html
HTH
--
Cheers
Nuno Souto
in sunny Sydney, Australia
dbvision@xxxxxxxxxxxx
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Niall Litchfield
Oracle DBA
http://www.orawin.info
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