I will be upgrading our database and application server from 8.0.5.2.1 and 11.0.2 to Oracle 8.1.6 and Applications 11.5.3. I understand from reading the upgrade manuals as well as confirming from Oracle support that the database must have a db_block_size of 8k or larger. We are currently setup with a 2k block size which means that we must re-build the database with an 8k or larger block size and the only why of doing that is via exp/imp. Can anyone share their experience with exporting and importing a large database with thousands of objects? We have about 35k objects in the database and a concern of mine is all the invalid objects that could appear after the import. Are there some key areas I can look at to help reduce the time to import as well as limiting the number of invalid objects? thanks in advance...roy -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Roy Ferguson INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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).