An operating system upgrade carries a lot of implications. How was the system configured before? How is it configured now? Most subsystem descriptions should carry their attributes (e.g., work management) over during an upgrade. Have you verified that they did?

Have you read through the i 6.1 Memo to users and verified that any relevant items were accounted for? Have you read through the i5/OS information overview and what’s new topic to see what might need attention (e.g., for Database or for ILE RPG Programming or whatever is appropriate)?

There are always lots of ways of doing things that don’t work as well in later releases. These should be examined before upgrading in order to decide if application or environment changes should be made.

Tom

You need to give us more information on the project you are talking about. I have upgraded multiple partitions from V5R4 to V6R1 and have not seen any performance degradation that I would attribute to the upgrade.
With that said, did you run Object Conversion on the objects in this project ?
If not, the system could be converting these objects the first time they are touched.

Give us more info and maybe we can assist.

Thanks,
Bill Poulin