Paul White (@SQL_Kiwi) details a regression bug in RCSI caused by a fix for a different bug. If you are running SQL Server 2008 R2, you should read this.
Paul White (@SQL_Kiwi) has put together a fantastic series on concurrency, the ACID properties of statements and transactions, and isolation levels in SQL Server.
Paul White (@SQL_Kiwi) continues his series on ACID and transaction isolation levels in SQL Server, giving us fair warning about some potential issues with the SNAPSHOT isolation level.
Continuing his series on knee-jerk reactions to wait statistics, Paul Randal (@PaulRandal) of SQLskills adds another chapter, this time focusing on PAGEIOLATCH_SH.
Jonathan Kehayias (@SQLPoolBoy) of SQLskills discusses predicates in Extended Events, and demonstrates why you need to list state-related predicates last.
Following the recent release of SQL Server 2012 Service Pack 2 and SQL Server 2014 Cumulative Update #3, SQL Sentry's Aaron Bertrand (@AaronBertrand) takes a first look at a new performance enhancement and trace flag (2453) aimed at improving cardinality estimates for table variables and table-valued parameters.