I think Jonathan has already mentioned that small stats errors will
likely have a larger effect when made on small tables rather than
large ones. I 'd be a little wary of monitor/gather stale which is what
Donald was suggesting for small tables when we know that these are
sensitive to changes, that gathering accurate stats on them is really
cheap.
> Whenever you drastically change your operations - going from RBO to CBO,
> going from nightly/weekly gather to no-gather with exceptions, going from
> no system stats to system stats, or vice-versa is always a big risk and
> should be tested very thoroughly.
Fortunately there are the export stats procedures in dbms_stats to
alleviate this risk somewhat.
--
Niall Litchfield
Oracle DBA
http://www.niall.litchfield.dial.pipex.com
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