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Re: Oracle's "dbv" : how frequently do you use it ?

From: <Jared.Still_at_radisys.com>
Date: Thu, 08 May 2003 11:42:18 -0800
Message-ID: <F001.0059451C.20030508114218@fatcity.com>


I never run it unless I suspect I need to for some reason.

In 9 years I've seen maybe 3 corrupt data blocks, all were indexes.

That said, the last time I saw one was probably 4-5 years ago.

Jared

Hemant K Chitale <hkchital_at_singnet.com.sg> Sent by: root_at_fatcity.com
 05/07/2003 11:06 PM
 Please respond to ORACLE-L  

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
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        Subject:        Oracle's "dbv" : how frequently do you use it ?



Yesterday, there was a server crash when the storage went "offline" at my site. The engineers were able to bring the storage back after a few hours and then ran "fsck" on the uFS file systems.
I then started up the Oracle Database.
Out of curiosity, I ran "dbv" on all the datafiles [online with the database open]. Only one page [an Index block] was reported as "Failing". I then rebuilt the Index [it was recreated to a different location]. Rerunning dbv I still saw the same error on the same block. As this block was now in a free extent, I wasn't concerned -- a new extent allocation would format the block when required.

So now I am curious. How frequently do people run "dbv" ? Only after crash recovery OR Regularly on Open Databases ?
I am thinking of setting up jobs to run "dbv" on critical databases regularly but would like to look for field experiences.

Hemant K Chitale
http://hkchital.tripod.com
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Author: Hemant K Chitale
  INET: hkchital_at_singnet.com.sg

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  INET: Jared.Still_at_radisys.com

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