Quote Originally Posted by skhanal View Post
Did you run dbms_stats after the upgrade?.
Yep. Sorry.. I should have posted this.

I did:
Gather_dictionary_stats_10g.sql
gather_system_stats_nw.sql
And also gathered schema stats for our application schemas

During a load, I did:
gather_fixed_objects_stats.sql
gather_system_stats_start.sql (WAIT 2 hours, then..)
gather_system_stats_stop.sql