RE: ora-01555 when running long script

From: Walthour, Jon (GEAE, Compaq) <Jon.walthour_at_ae.ge.com>
Date: Sun, 23 Sep 2001 16:48:50 -0700
Message-ID: <F001.00395CAA.20010923165018@fatcity.com>

One thing to remember here is that a single transaction will only use one rollback segment. The problem is that ORA-1555 errors occur because a consistent get for a particular db block failed.

Here are some things to check:

1. Make sure you're running this script during off hours. The fewer transaction that are running to change db blocks, the better.
2. Place as many explicit commits in your script that are realistically possible.
3. Shrink all your rbs's to their optimal size before running the query.

For more information on ORA-1555 errors, check out Steve Adams' excellent treatment of it at http://www.ixora.com.au/tips/admin/ora-1555.htm.

Jon Walthour

-----Original Message-----

Sent: Sunday, September 23, 2001 6:15 PM To: Multiple recipients of list ORACLE-L

Hi,

We are running script in whcih we are updating 25 tables but after every 5 tables we are getting oracle error ora-01555.. we tried many options with rolback segment but no use:
1) few very large rollback segment
2 many large rolback segments

rollback tablespace size is 5GB
what can be the other causes for error???

Thanks
-harvinder
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Author: Harvinder Singh
  INET: Harvinder.Singh_at_MetraTech.com

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Author: Walthour, Jon (GEAE, Compaq)
  INET: Jon.walthour_at_ae.ge.com

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San Diego, California        -- Public Internet access / Mailing Lists


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to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). Received on Sun Sep 23 2001 - 18:48:50 CDT