Hi Hacoo,
I guess when it comes to the upgrade for the gateway you will face two steps:
- Upgrading the Gateway.
- Upgrading the Gateway DB version (nothing to do with the MySQL DB version upgrade).
So you can update the Gateway software and the MySQL DB version at the same time - as the Gateway process will be stopped and not connecting to the DB at this time.
But when it comes to the Gateway DB version upgrade - then the MySQL should be up and the Gateway ready to connect to it.
Hope this make sense.
If you like - contact the support team and we can have a quick phone cal and explain in more details if needed.
Regards,
Amit.