Aaron Bertrand (@AaronBertrand) discusses some obstacles he recently encountered when configuring an Availability Groups lab environment and how some assistance from the community helped him isolate and solve the issues.
Aaron Bertrand (@AaronBertrand) of SQL Sentry discusses a couple of advantages and a hefty list of limitations with filtered indexes in SQL Server 2008 and above (with links to no less than 36 Connect items!).
SQLskills.com's Joe Sack (@josephsack) walks us through an interesting scenario where we might blame a query performance issue on parameter sniffing or bad statistics, when it actually turns out that a check constraint is the best solution to keep the optimizer honest.
Jonathan Kehayias (@SQLPoolBoy) demonstrates column-side implicit conversions and the impact they can have on a workload. He concludes that you can only throw hardware at this problem for so long; a design or code change will be necessary to solve the performance issue long-term.