The new 3.8 feature of tracing is very useful. I have been looking at where performance is worse and using tracing is very handy.
I am currently looking at the newest version of MEB. I have some experience of 3.7 and was keen to experiment the new version
I have been working on an upgrade path from 5.5. to 5.6. The MySQL documentation is good and explains what could be a muliple phase upgrade to get to 5.5 to then upgrade to 5.6, see
Here are few notes which I hope helps. There looks to be two ways to upgrade from 5.5 to 5.6.
- Binary Upgrade