If you are looking at 10gR2 for critical production systems than you are amongst pioneers anyway. One can argue that they are running 10g in production for a year or more but definitions of criticality vary.
Alex, FWIW, I saw a live demo of DB Control/ADDM on Oracle's own worldwide Oracle Apps Single instance that apparently is 4 TB (?). This was at OOW and the demo was part of a presentation by none other than Ahmed Al-Omari. Oracle Apps is a pretty complex (in terms of number of objects, users, mid-tier technology stacks, size, SQL code and the number of intergrations between the 200+ modules). This may have been on oversized hardware (4 Node RAC, 50+ Apps servers, etc.), but I was quite impressed, actually. I think they have been live on 11.5.10 with 10gR2 about 6-8 months at least? -- John Kanagaraj <>< DB Soft Inc Phone: 408-970-7002 (W) Disappointment is always inevitable; Discouragement is invariably optional ** The opinions and facts contained in this message are entirely mine and do not reflect those of my employer or customers **