All, Environment: 8 node RAC on Solaris Sun sparc 9 64 bit Database : 10.2.0.3 RAC Customer is upgrading CPU boards from Sparc IV to Sparc IV pluses. There is no change in the number of cpus. Assuming there is no collection of system stats (which could thus affect query plans) can anyone think of any other issues...in doing this upgrade... Also is anyone out there using Sparc IV pluses. Ta Fairlie Fairlie Rego Senior Oracle Consultant http://el-caro.blogspot.com/ M: +61 402 792 405 --------------------------------- Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online.