Monthly Archives: October 2014

Watch out for optimizer_adaptive_features as It may have a huge negative impact

Let me describe how I discovered that the optimizer_adaptive_features may have a huge negative impact (specially on RAC databases). I upgraded a 11gR2 database to 12.1.0.2 and then I converted this database to a PDB. To do so I launched … Continue reading

Posted in Performance, Rac | 7 Comments