Thanks Vlad - that did indeed cover some of what I recalled. On Jan 8, 2008 12:37 PM, Vlad Sadilovskiy <vlovsky@xxxxxxxxx> wrote: > Niall, > > There was post named "I/O and db_file_multiblock_read_count" where this > was discussed. In case you need it let me know. > -- Niall Litchfield Oracle DBA http://www.orawin.info