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RE: ORA-01555 Mystery (Help)

From: Walter K <alden14004_at_yahoo.com>
Date: Fri, 25 Jan 2002 15:16:02 -0800
Message-ID: <F001.003FBE4E.20020125151053@fatcity.com>

Jared:
The table was analyzed (via estimate) Wednesday night. I don't know if it was before or after Wednesday night's attempt at the extract but if the blocks are getting cleaned out via the 'analyze..estimate' then delayed block cleanout should definitely not have been an issue for Thursday night's attempt.

Barb:
I understand what Mladen is saying but it shouldn't be an issue because the table has been locked in exclusive mode prior to the running of the query and the lock took. So, even if some rogue process out there was attempting to change data in the table after the query started, it shouldn't matter because the rogue process(es) would get stuck waiting on the table lock.

I was lucky that the query is being re-run today while I am still at the office so I looked at the DB activity and nothing is happening in the rollbacks, as I expected to see. Discrete transactions aren't an issue as the warehouse developers don't know about them. I also recreated all of the rollback segments for grins.

We'll see what happens tonight. Unfortunately, if it works tonight I still won't really know why. :(

-w


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Author: Walter K
  INET: alden14004_at_yahoo.com

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Received on Fri Jan 25 2002 - 17:16:02 CST

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