Performance Issue

Hi all,
we are experiencing performance problems.
Before, several month ago, Projeqtor will work quickly, but now all actions take time, and severals ones are so long.
exemple : i deleted today 7 milesones on a project and it took several minute.
Two years ago babynus was perform a performance analyse, and after that, we had changed the server, and severals configurations elements. Peformances was better.
In addition, we don't have any information about what actions take times. i have looked the log, but nothing.
Is there any possibility to add verbose level in the log to see more information about this issue.
thank's for your reply.