Thanks Thomas. Today we had a performance problem about 3 hours ago, we had to reboot the Windows server to solve it. Prior to the restart, the OAT-NT gap was 120479. After the restart it was 33.

Interestingly enough, currently the gap is 354354 as I write this. That's almost three times the gap we had at the time of the restart, and performance has been normal since we restarted.

Thanks everyone for the help, any other pointers are much welcomed.

Best Regards,

-Eduardo