All, We are coming up with a design for a newer system for one of our existing applications. We are trying to find out the IOPS of the existing system. I can get some information from the v$filestat, but that seems to be from instance startup. We are more interested in knowing the IOs during peak hours, week end hours, IO during the batch operations, etc going back a month or two. Is there a another place to get that information. Thanks. CP. -- //www.freelists.org/webpage/oracle-l