Hi all ! I have got such problem. Im running Postgresql 7.3.2 on Linux 2.6.13. What is see when VACCUM is running and killing my CPU is: Cpu(s): 3.2% us, 0.0% sy, 0.0% ni, 0.0% id, 96.8% wa, 0.0% hi, 0.0% si what i am worry about is "96.8% wa" why is it like that? what is the process waiting for ? could somone explain me that please? :) Best regards david