On 3/3/08, Don Seiler <don@xxxxxxxxx> wrote: > I've read a couple blog posts that say to gather fixed object stats > weekly, during normal business hours. Another page [0] also suggested > gathering dictionary stats as part of the same weekly process. > > Anyone have any thoughts? > > Don. > > [0] > http://www.toadworld.com/Community/ExpertsBlog/tabid/67/EntryID/135/Default.aspx > > > On Mon, Mar 3, 2008 at 9:39 AM, Don Seiler <don@xxxxxxxxx> wrote: > > I did have some follow-up questions regarding > > DBMS_STATS.GATHER_FIXED_OBJECT_STATS(). > > > > 1. We had noticed that, since gathering the fixed object stats, the > > time needed to perform a level 0 incremental backup dropped by around > > 40%. Is this not a coincidence? > > > > 2. Is there any schedule or milestone upon which one should re-gather > > fixed object statistics? I would recommend that you check out Upgrading from Oracle Database 9i to 10g: What to expect from the Optimizer http://www.oracle.com/technology/products/bi/db/10g/pdf/twp_bidw_optimizer_10gr2_0208.pdf This is discussed on page 7 & 8 (Statistics on Dictionary Tables & Statistics on Fixed Objects) -- Regards, Greg Rahn http://structureddata.org -- //www.freelists.org/webpage/oracle-l