I use ISPConfig 3 on Ubuntu 14.04.2 LTS. MySQL 5.5 I need to add MySQL 5.6. What is the best solution? a) install MySQL 5.6 as second MySQL service or b) upgrade MySQL 5.5 to 5.6 version My server is on production and I don't want to break it down. What solution has short down time? What solution is safe to run on production server? Thanks