SQL Server maintenance script before upgrading EV 10 to v11 ?

Hi All,

Before upgrading the EV v10 to version 11, so I wonder what sort of SQL Server maintenance task that I need to complete before hand to ensure smooth upgrade ?

Note: 

I'm now using

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Microsoft SQL Server 2008 R2 Enterprise Edition (64-bit) (SP2) - 10.50.4000.0

I tried to look into: https://technet.microsoft.com/en-us/library/ms137718(v=sql.120).aspx but not sure which table that I need to focus on.

Thanks.