Over 3 weeks ago we solved the issue we were having with one particular cluster node running SQL Server 2008 R2. We have been going back and forth with Microsoft to obtain an explanation on why the erratic behavior of the RDBMS engine.
Tags: 2008 R2, Affinity, Affinity I/O Mask, BIOS, CPU Affinitty, hyperthreading, Microsoft, performance, pssdiag, RDBMS engine, sql server