I cannot speak for the list, but I believe that 10g does have statistics on SYS tables. Let others verify that - cause I don't wish to double check now Joel Patterson Database Administrator joel.patterson@xxxxxxxxxxx x72546 904 727-2546 ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Dennis Williams Sent: Monday, June 25, 2007 2:12 PM To: Patty.Charlebois@xxxxxxxxxxxxxx Cc: Oracle-L@xxxxxxxxxxxxx Subject: Re: Querying v$ tables very slow after upgrade Patty, I haven't experienced 10g yet, but the advice I recall on this list was not to have statistics on SYS tables. Can anyone else on the list clarify that? Dennis Williams