prasad0889 We can restart the application role, email role and DB role from the UI, but since the past few days, we can see that the DB role restart doesn't work. Application and Email role restart works properly.
PradeepC The DB role restart would take a few seconds, and the website would show a error establishing a database connection for starters.
Adam If the server isn't heavily loaded it should restart very quickly. After the restart, run: mysql -e "show status LIKE 'Uptime';" You should see a value close to zero.