Yep, I'm afraid I have. ;-) Most of the time, the difference is between planned vs unplanned downtime. For instance, I have a customer who can have downtime every night. But no downtime during business hours. Regards, Freek D'Hooge Uptime Oracle Database Administrator email: freek.dhooge@xxxxxxxxx tel +32(0)3 451 23 82 http://www.uptime.be disclaimer: www.uptime.be/disclaimer --- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Zhu,Chao Sent: maandag 4 april 2011 13:10 To: gints.plivna@xxxxxxxxx Cc: nupendra@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: Re: Standard Edition RAC - CPU core limit? If i remember correctly, standard edition has severe limitation like no online index creation, such kind of very basic requirement; So if a system needs RAC kind of avalibility, wondering how can it fit into standard edition? anyone has such kind of standard edition rac running? -- //www.freelists.org/webpage/oracle-l