I'm upgrading with an in-place strategy from SQL 2008 to SQL 2012, Data size is over 6 TB.
I'm planning to run after the upgrade DBCC CHECKDB with physical_only and update statistics with sample 4 percentage.
Is it enough? Do I take a risk if I don't run a complete DBCC CHECKDB and Update statistics?
Do I have to run also DBCC UPDATEUSAGE?
I'm planning to run the complete set (DBCC CHECKDB with no restrictions, Update statistics with no sample and updateusage ) a week after the upgrade.
Should it be run before or after the change of the compatibility level?
A day before the upgrade, run DBCC with NOINDEX on all DBs
Upgrade partner A
Run DBCC with Physical_only
Failover to partner B
Run DBCC Checkdb with physical_only
Resume Mirror.
2 days of regular work
Weekend - Run full DBCC checkDB