RE: ORA-1578...block corrupted...error is normal...a block...had a NOLOGGING...operation performed against

Thanks Jared, I'll do some more tests to see if I can figure out exactly what's going on. I suspect that the direct-insert is minimally logged as it says in the documentation, but perhaps there is still a signifcant amount from dictionary updates due to block splits and other recursive activity, and when you recover, the direct-inserted blocks are corrupt, but the select statement you ran for the regular (non-direct, logged) insert did not need to touch those corrupt blocks so it completed just fine - but if you forced a full index scan, you would see the corruption.  

-----Original Message-----
From: Jared Still [mailto:jkstill_at_gmail.com] Sent: Tuesday, August 23, 2005 2:47 PM
To: Allen, Brandon
Cc: oracle-l_at_freelists.org
Subject: Re: ORA-1578...block corrupted...error is normal...a block...had a NOLOGGING...operation performed against

v$datafile
FILE_NAME

------- ------------------- ---------------------
/u01/oradata/dv03/test01.dbf
ONLINE  08/23/2005 12:33:51            1039632753

---------------------------------------------------------------

14:44:28 SQL>l
  1* select * from v$backup_corruption
14:44:29 SQL>/   no rows selected  

DBV: I have not included any dbv output. dbv reports every file I test as corrupt ( including SYSTEM) This is with the database shutdown.
Don't know what the problem there is, but I'm not going to pursue it right now.

Jared

On 8/23/05, Allen, Brandon < Brandon.Allen_at_oneneck.com> wrote:

Thanks for the great test case Jared - just a few questions:  

Can you check the following to see if there is any indication of corruption due to the recovery through the nologging operation:  

• v$datafile: unrecoverable_time & unrecoverable_change# columns
• v$backup_corruption
• run dbverify on the datafile

Have you submitted your case to Oracle support to see if it is a bug, or if we're all missing something?  

Thanks again,
Brandon  

-----Original Message-----
From: Jared Still [mailto: jkstill_at_gmail.com] Sent: Tuesday, August 23, 2005 12:46 PM
To: Hemant K Chitale
Cc: Allen, Brandon; cmarquez_at_collegeboard.org; oracle-l_at_freelists.org Subject: Re: ORA-1578...block corrupted...error is normal...a block...had a NOLOGGING...operation performed against

On 8/23/05, Hemant K Chitale < hkchital_at_singnet.com.sg> wrote:

Jared,

You ARE right. You really don't need to retest it.

Maybe not, but I want to.

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-- 
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist




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