Hi Daniele
Addition to the steps you have mentioned you need to check few points
1: Why there is too much defect is creating ? and do you really need them
please check your threshold value and the condition you have defined to create a defect
2: I am not sure when you have enabled those settings but it will be effective after midnight
if tomorrow also no improvement then
3: You need to enable the MOM +Tim collector service log in debug mode and check if there is any
issue with defect aggregation or not
Hope this will help you ..
Thanks