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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Specify Rollback for an Export
Dennis- The export is from a production system and the import is onto a
development/reporting system, so the import time is not very important. I am
using a QUERY parameter to limit the amount of data, but it is still doing a
full table scan to get the rows. I will think about how I can paralleize
this operation. I have also increased the BUFFER parameter to 10MB. The
export is running right now, so I will know how successful it is in the
morning.
Thanks again for your help and interest. Erik
-----Original Message-----
Sent: Friday, October 18, 2002 3:39 PM
To: Multiple recipients of list ORACLE-L
Erik - Here is another thought for you. If the table you are exporting is that large, how long will it take you to import it somewhere? Import can be several times longer than export, since it is doing inserts rather than just a query. Tables that take hours to export can take days to import. What is your goal with this export? One thought is to break the export into several files by exporting based on a SQL statement. Then you can either just export the data you need or if you need it all, on a multi-CPU system you can run several import jobs at the same time.
Dennis Williams
DBA, 40%OCP
Lifetouch, Inc.
dwilliams_at_lifetouch.com
-----Original Message-----
Sent: Friday, October 18, 2002 2:03 PM
To: Multiple recipients of list ORACLE-L
Thank you all for your feedback. I will try again tonight with the following changes 1) take all rb segments off line except the large one 2) set the buffer to 10000000 (was default before). I will let you know how things went (or didnt) on Monday morning.
Thanks again.
Erik
-----Original Message-----
Sent: Friday, October 18, 2002 10:14 AM
To: Multiple recipients of list ORACLE-L
I am performing an export of a set of very large tables. I am not using CONSISTENT mode. The exports are failing due to snapshot too old errors. The application uses many small rollback segments, but has one large one for big transactions. Is it possible to force the export to use the large segment without taking all the others (except System) offline? I have seen this question asked on the list before, but did not find a definitive follow-up answer.
Thanks
Erik
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Author: Erik Williams
INET: ewilliams_at_brownco.com
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Erik Williams
INET: ewilliams_at_brownco.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services ---------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message 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).
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services ---------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message 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).
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Erik Williams
INET: ewilliams_at_brownco.com
Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services ---------------------------------------------------------------------To REMOVE yourself from this mailing list, send an E-Mail message 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 Fri Oct 18 2002 - 19:43:32 CDT
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