I have 3 instances of BigFix I am upgrading.
Instance 1
Windows Server 2012 Standard - SQL Server 2012
Time to upgrade (from the time I hit the last OK till the last windows indicating success.
Version 9.0.876 to version 9.2.6.94
8 minutes 20 seconds
My BFEnterprise DB Size:
Pre Upgrade: 1.7 GB
Post Upgrade: 3.6 GB (an extra 2 GB???)
Pre-upgrade DB size

Post Upgrade DB size

+1 for the UI Upgrade

Instance 2:
Windows Server 2012R2 - SQL Server 2014
Version 9.0.876 to version 9.2.6.94
Time: 8 min 30 sec
My BFEnterprise DB Size:
Pre Upgrade: 3.2 GB
Post Upgrade: 6.2 GB (3 GB Larger)
Instance 3:
Windows Server 2012 R2 - SQL Server 2014
Version 9.2.5.130 to version 9.2.6.94
Time: 26 min 30 secs
My BFEnterprise DB Size:
Pre Upgrade: 42 GB
Post Upgrade:42 GB (unchanged)