I have a two-node RAC running an 11i-ebusiness suite (11.5.9/9.2.0.6 64-bit). I am seeing the following from Statspack: Inst Statistic Total per Second per Trans ----- ---------------------------------------- ------------------ -------------- ------------ 1. global cache blocks lost 28 0.0 0.0 2. global cache blocks lost 4,410 2.7 0.9 We are using three giga-bit private interconnects going through a switch. This does not see like an interconnect issue otherwise, I think, I would have seen a higher number on the 1 node as well. Any idea what might be causing it? Thanks Amir