Hi! The upgrade-manual, but I think you have looked at that. Expect problems with dangling synonyms and differences with parameter-types between spec and body in packages, for example leaving default-values. Package Body's wont compile if there are these minor differences. So look at invalids. You can upgrade directly ;-) export/import: how big are your db? Try with your clone to see how long time it tooks. And make your test on correct os-platform. Measure time of typical batch-jobs and queries before upgrading. Check your access to Metalink. Plan in your calender that it won't succeed at 1. try. And when upgraded - enjoy the big amount of new features (-: PL/SQL-developer group and DBA's should be prepared using the new features). Greetings Bjørn ----- Original Message ----- From: Paula Stankus To: oracle-l@xxxxxxxxxxxxx Sent: Tuesday, July 18, 2006 1:07 PM Subject: Re: 8i to 10g migration We have the following environment: -a great deal of database links -materialized views over database links -Oracle 8.1.7 -Solaris 2.9 - .Net with ODP -Powerbuilder -Data Junction -Siebel -Cobol programs precompiled and are planning a migration from 8.1.7 to 10g. Where is the best place to look for gotchas: -database links -hints that have been desupported -Issues with .Net -Issues with Cobol precompilers -Performance concerns -migration path - direct migration or export/import???? I am planning to clone production, give ample time to multiple development teams to test this out. I am planning to take sample queries generating execution plans in both environments and traces. I am planning a stress-test. Any advice would be greatly appreciated. -required PL/SQL changes ------------------------------------------------------------------------------ See the all-new, redesigned Yahoo.com. Check it out.