Every time I need to update my emdx from database, the update wizard takes an incredible amount of time to do so rendering itself as not responding once you hit the finish (as finish the update) button.
I use Visual Studio 2015 and LocalDb SQL Server 2014. Some people suggested to install the Service Pack 1 to address the issue. I have installed the SP1 for LocalDb, but it has not helped. My installation of VS2015 is also rather new.
I have the latest Entity Framework 6 version (from nuget).
Setting the compatibility level of the database to 110 has worked for me.
To check the compatibility level, run this script:
select compatibility_level from sys.databases where name = '<YOUR_DB_NAME>'
To set the compatibility level, use this script:
alter database <YOUR_DB_NAME> set compatibility_level = 110