We are running Oracle 10.2.0.3 - 64 bit HP-UX on PA-RISC hardware and have stats on the SYS owned objects that can have stats - and no performance problems querying any dictionary information... So, do you have any carry over init.ora/spfile settings from 9i like events, hidden parameters, optimizer settings... What O/S and release are you using? ________________________________ 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